EP0013023A1 - Procédé et installation pour la mouture de céréales - Google Patents

Procédé et installation pour la mouture de céréales Download PDF

Info

Publication number
EP0013023A1
EP0013023A1 EP79105351A EP79105351A EP0013023A1 EP 0013023 A1 EP0013023 A1 EP 0013023A1 EP 79105351 A EP79105351 A EP 79105351A EP 79105351 A EP79105351 A EP 79105351A EP 0013023 A1 EP0013023 A1 EP 0013023A1
Authority
EP
European Patent Office
Prior art keywords
control
mill system
grain mill
grain
grinding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP79105351A
Other languages
German (de)
English (en)
Other versions
EP0013023B1 (fr
Inventor
Ernst Mächler
Emanuel Kummer
Werner Baltensperger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Buehler AG
Original Assignee
Buehler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP0013023A1 publication Critical patent/EP0013023A1/fr
Application granted granted Critical
Publication of EP0013023B1 publication Critical patent/EP0013023B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C9/00—Other milling methods or mills specially adapted for grain
    • B02C9/04—Systems or sequences of operations; Plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the invention relates to a method for grinding grain in a grain mill system with control means for controlling process elements (regrind and system elements) and associated operational process parameters.
  • the invention also relates to a grain mill system with control means for control including locking of process elements (regrind and system elements) and associated operational process parameters, in particular during the start-up, work and run-down phase.
  • Such a method and such a grain mill system are particularly suitable for grinding grain into flour, semolina and haze.
  • the method and the grain mill system preferably have at least one process zone for cleaning and wetting, for roller grinding and extraction of the products by screening and / or for the storage of the Starting and end products.
  • process variable essentially includes 1) predefined process variables and 2) operational process variables.
  • the 1) predefined process variables essentially consist of T.1) predefined process parameters and 1.2) target variables.
  • the 2) operational process variables essentially consist of the 2.1) operational process parameters.
  • Input signal quantities are the data that are obtained by quantitative and / or qualitative evaluation of the process quantities.
  • Specified process parameters are essentially predetermined, variable or constant parameters which affect the process from the outside.
  • Variable predetermined process parameters are e.g. B. the relative humidity and air temperature.
  • the input signal sizes of these variable process parameters are e.g. B. Values in% and in ° C.
  • Constant predetermined process parameters are e.g. B. the type of grain, the type of wheat, the grain or wheat quality, the wheat mixture, etc.
  • Input signal sizes for the type of grain are such.
  • B. the qualitative information of rye, wheat, barley, oats, corn etc., and their botanical classi classification including fine classification as used in practice.
  • Input signal quantities for the wheat type are e.g. B. common wheat and durum.
  • the wheat quality can e.g. B. by the input signal quantities of ash content, protein content and gluten content of the wheat, each in% by weight.
  • Input signal quantities for the wheat mixture can e.g. B. consist of the following sequence: X -% by weight of wheat A; Y - wt% wheat B; Z -% by weight of wheat C, etc.
  • the season the wheat harvest in connection with the cultivation area, the storage time of the wheat, the specific weight of the wheat, the type of rollers and / or roller mills (input signal sizes are e.g. smooth or Corrugated rolls, specific length of the rolls used, ie length of the rolls per throughput); Type of cleaning machines, power supply units, scrubbing machines, peeling machines, plan sifters and grit cleaning machines etc. and the throughput of the grain mill system.
  • Target sizes are those sizes that are to be achieved through the grinding process; so z.
  • the process control in a grain mill system is always aimed at obtaining output quantities or products that come as close as possible to the target quantities.
  • Operative process parameters are essentially those parameters which can be influenced in any way within the grinding process, in particular thus controllable and / or regulable parameters, for example the roll gap, the roll pressure, the roll speed, the roll temperature, the millbase temperature, the millbase moisture as a result of wetting and Stand out, possibly the mill throughput within the limits given by the minimum and maximum throughput and the sieve fraction, ie the proportion of screen rejection to screen diarrhea.
  • Operational process parameters directly assigned to the process element pair of rollers are e.g. the roll gap, the roll temperature and the roll pressure.
  • the process element regrind is e.g. the temperature and the moisture achieved by wetting and standing out can be directly assigned as operational process parameters.
  • the operational process parameter sieve fraction represents a parameter which can only be indirectly assigned to the roller pair. Because the sieve fraction is not assigned exclusively to the pair of rollers, but also to the regrind used, the preparation of the regrind carried out, the sieving, the throughput, etc.
  • roller gap parameter that is to say the distance between the rollers, can be directly assigned to the process element roller pair; the process variable screen fraction or the process element "regrind after the nip", however, it can only be assigned indirectly.
  • the yield calculator uses this data to calculate the yield based on a predetermined operating time or a predetermined batch.
  • the heart of the mill namely the grinding zone, especially au the roller mills and the cleaning are only connected and controlled by mutual locking of their individual elements; nevertheless, their operation during the start-up, work and phase-out phase - even without a computer - can be considered quasi-automatic.
  • the entire product flow is automatically led by the raw fruit through all process zones in compliance with the correct sequence - also during the individual process stages - in particular over all grinding stages B1 'B 2 , ..., C 10 , classifiers and, if applicable, grit cleaning machines.
  • the desired end products are obtained in stages.
  • the reliability of the individual process elements i.e.
  • the Obermüller checks and monitors one with his human sensory organs whole number of factors, e.g. B. the quality of the grain, the image of the first meal, in particular the shell or its fragility, the cracking, the thickness, the surface of the shell, and especially the amount of semolina, etc.
  • Obermüller - also with his human sensory organ - also checked the grip of the flour and its baking properties, the taste and smell of the bread, etc. in the laboratory.
  • the method for grinding grain and the grain mill system to which the invention relates it is known, for example, to adjust the amount of water supplied and to vary the time for the ground material to stand and the temperature in the stand-off cells.
  • the specified process parameters of the type of wheat, the amount of wheat and the moisture in the wheat are recorded quantitatively and qualitatively and used as input signal variables for the control of the mill.
  • the teaching according to the invention is based on the object of improving the process for grinding grain specified in the preamble of claim 1 and the grain mill installation specified in the preamble of claim 8 in such a way that the process and the grain mill installation are carried out more easily, while largely maintaining their previous advantages allow the Obermüller.
  • this object is achieved in the method for grinding grain in accordance with the preamble of claim 1 in that the control is initially based on a group of selected predetermined process variables or predetermined process parameters and target variables and then quantitative and assignable to the process variables of the selected group Qualitative values are determined and used in groups as input signal variables for control, each group of input signal variables determined from the predetermined process variables being assigned a predetermined group of control signals and the group of control signals obtained by the assignment being used for automatic control of such control chains and / or control loops which directly influence operational process parameters that can be directly assigned to the process elements.
  • Predefined process parameters are preferably used as predefined process variables.
  • target variables can also be used for this purpose, if appropriate together with predefined process parameters.
  • This solution has the advantage of an optimal division of labor between Obermüller, control and machinery. It enables a particularly optimal and stable guidance of the mill.
  • the teaching according to the invention is based, inter alia, on the idea that the product to be processed in a process for grinding grain and in a grain mill system is living matter which is consumed by living beings after it has been processed.
  • a grain mill plant is neither a chemical factory nor a cement factory. Therefore, it must not be operated according to these models. Rather, it must be left in its own regularity.
  • the invention is based on the finding that the consequent displacement of people from a grain mill system would also lead the mill away from its actual goal, namely to ensure the production of the raw material flour, semolina, etc. for good bread, pasta or the like for people. If it already applies to animals that feed, etc. should be offered in the condition that suits them, this applies even more so to humans.
  • the aim of a process for grinding grain in a grain mill plant must be to produce flour from which, for. B. good bread can be baked. This is but the participation of the Obermüller is indispensable. Accordingly, a good end product can only be achieved through full interaction of the miller with the machines and the control system.
  • the process sequence in the individual sections of the grain mill plant is also better controlled by the fact that the participation of the upper miller is not waived precisely at the critical points of a grain mill plant. Because the computer, in addition to downstream control chains and / or control loops, is assigned those tasks in which it relieves the head miller and which he can do better in the case of pure routine work. It has been recognized that a mill must be run like a modern passenger plane. The mill is to be given an automatic "pilot" who supports the guidance, not replaces it. Just like with the aircraft, the "starting" (start-up phase), “flying” (work phase) and “landing” (run-down phase) should ultimately also be supported in the mill system.
  • the grain mill system according to the invention is also characterized by increased operational reliability. This is ensured in particular by the decentralized structure of the control system according to the invention.
  • the assembly with a storage unit and downstream, externally controllable control chains and / control loops can namely be connected to the control means.
  • a simple shutdown is sufficient the assembly from the control means in order to be able to continue the mill in a conventional manner.
  • the machinery is understood to mean the original (process) elements of the mill system. These are in the cleaning z. B.
  • the head miller has direct access to both the machine park and the control system. He has to make certain settings on the machines (e.g. hourly output, roller setting), while he uses the control e.g. B. defines the entire route selection (e.g. product from silo X via cleaning and wetting in stand-off cell Y). He also receives a lot of information from various measuring devices, on the basis of which he can carry out certain interventions in the machine park and / or the control.
  • settings on the machines e.g. hourly output, roller setting
  • control e.g. B. defines the entire route selection (e.g. product from silo X via cleaning and wetting in stand-off cell Y). He also receives a lot of information from various measuring devices, on the basis of which he can carry out certain interventions in the machine park and / or the control.
  • Decentralization is provided within the module that can be activated by the control means insofar as the storage unit and the control chains or control loops are only supplied with the information that they absolutely need for their work.
  • the control chains and control loops work autonomously within the areas of responsibility assigned to them. They are only dependent on the storage unit via the lines for the control signals.
  • the teaching according to the invention also makes it possible to develop the mastery of a grain mill system from the simplest step up to the most complex intervention options, so that the experience gained can be continuously expanded and finally the highest level can be reached safely.
  • This possibility is particularly guaranteed by the fact that several control chains and / or control loops that can be controlled by the storage unit (externally) are provided and the control chains and control loops are designed to influence, in particular direct influence, operational process parameters that can be directly assigned to the process elements are. This ensures a high degree of transparency of the process flow within the mill if the influence of the operational process parameters on the process flow is particularly well established is adjustable; in particular because the affected process parameters are directly assigned to the process elements.
  • the switchability of the module also enables the automation of already existing systems to be implemented, the existing control means only having to be converted for external control by control chains and / or control loops.
  • the control loops can be constructed, for example, by converting the existing control means into actuators and supplementing the corresponding machine parts with actual value sensors and controllers, including comparators.
  • the Obermüller always remains up-to-date, since he decides whether a change in the control signals assigned to the input signal quantities appears desirable or not. He will always take the target values into account. If he has found an optimal assignment between the input signal sizes mentioned and the control signals, this assignment is ensured by appropriate memory allocation and addressing within the grain mill system. The optimization process can thus be repeated in the future, depending on the respective circumstances. determined and taken over by the control.
  • a safe association between the groups of input signal quantities and control signals is ensured by using an electronic data storage unit, the control signal groups being written into the storage unit and a group of input signal quantities being used as the address signal for a group of control signals.
  • the control signals are preferably used for specifying the setpoint of corresponding control loops, the signal outputs of the memory unit being connected to the control inputs of the setpoint generators of the control loops.
  • the top miller can, for example, reproducibly specify any desired value for an operational process parameter that can be directly assigned to a process element.
  • the process element can be, for example, the pair of rolls and the operational process parameter the roll spacing.
  • the teaching according to the invention enables in particular a stable start and start phase of the grinding process in that according to eino; 1 worded embodiment, a control signal, preferably a plurality of control signals of the group of control signals assigned to the input signal quantities are changed.
  • a major change in the control signals is preferably carried out in stages depending on the operating time of the grain mill system that has elapsed since the switch-on time.
  • the regrind flow rate, the regrind moisture obtained through the wetting and the standing time, the roller spacing and / or the roller pressure and / or the roller temperature are subjected to a control or regulation.
  • a control or regulation of these process parameters is easier to reproduce by the control chains or control loops than by an Obermüller.
  • the Obermüller is relieved by this type of division of tasks, so that he can better devote himself to the specific tasks.
  • monitoring or measuring devices which are used for monitoring target variables can also emit signals by appropriate limit value settings if deviations from the set limit values occur. These signals can then e.g. B. initiate appropriate conversions or shutdowns of the mill, the intervention via the host computer described later or directly the locking can take place.
  • the memory unit is designed for the programmable change of the control signal group assigned to an input signal size group.
  • Appropriate programming of the memory unit means that the control signals can be adapted to a desired behavior of the grain mill system, particularly during the start-up phase.
  • a further decentralization of the grain mill system is achieved according to a preferred embodiment in that at least one or more process zones (cleaning and wetting, roller grinding and extraction of the products by screening and / or silo system) can be connected to a storage unit, the storage unit preferably being a read / write storage unit is trained.
  • Such a read / write memory is particularly suitable for bringing the stored setpoint representative control signals up to date.
  • the write inputs of the memory unit can be connected to the signal outputs of the actual value sensors of control loops to write the memory locations with new setpoint representative control signals. If the head miller finds that a setting of a new setpoint, for example by hand, improves the grinding result, this new setpoint can be stored by connecting the actual value sensor signal output to the corresponding write input of the storage unit.
  • the head miller can therefore first be called up from the memory by calling up the group of control signals assigned to the predetermined input signal quantities set the entire mill system "roughly". He can then fine-tune the individual operational process parameters until an optimal result is achieved. These fine adjustments can then be written into the data memory as new control signals or control signal groups, if this is desired.
  • the assembly preferably has a master computer (processor) whose control outputs can be connected to the address inputs of the memory unit. This facilitates correct addressing of the storage unit.
  • processor processor
  • the setpoint generators are preferably controllable by hand.
  • the control loops are preferably designed to regulate the regrind flow rate, the regrind moisture, and / or the flour quality with respect to the mixture proportions.
  • control loops are designed to regulate the grinding roller setting by controlling the grinding gap adjustment device.
  • the grinding roller setting in particular represents an essential operational process parameter for the grinding of grain within a grain mill system.
  • the grinding gap adjustment device serves as an actuator of the control loop and can be controlled by the manipulated variable emanating from the controller. It is essential in this exemplary embodiment that all settings of the grinding roller pair, for example the roller spacing, the grinding pressure, the motor power consumption and / or the values of a code disk or a display clock can be controlled via the grinding gap adjustment device.
  • control variables namely the roll distance, grinding pressure, motor power consumption of the roll pairs and / or values of a code disk or a display clock
  • the manipulated variables i.e. the control signals from the controller for changing the actual values, are always fed to the grinding gap adjustment device. Accordingly, there is a need to change a wide variety of "controlled variables" as the roller spacing, the grinding pressure, the motor power consumption, the roller pairs and / or values of a code disc or an indicator clock (one and the same) grinding gap adjustment device provided as an actuator.
  • the elements of the control loops are designed in such a way that the setpoints can be set by hand and then transferred to the storage unit for later setting of the setpoint for the controllers.
  • switching means are provided which enable manual adjustment of the grinding gap adjustment device and / or regulation of the grinding roller setting according to manual setpoints and / or according to storage setpoints. If the switching means are switched to manual setting, the top miller can book to optimize the grain mill system by manual setting. If he has achieved an optimal process flow within the grain mill system by manual setting, then the values corresponding to the manual settings can be made using the Actual value sensors of the control loops or measuring devices to be written are determined and written into the memory via the write lines of the memory unit.
  • control loops are preferably assigned here.
  • measuring devices for determining further process variables are preferably provided.
  • Measuring devices are preferably provided for determining process variables which are not subject to direct influence by those control chains and / or control loops which are controlled by the storage unit.
  • the measurement signal outputs of the measuring devices can be connected to the control inputs of at least one setpoint generator, at least one memory unit and / or at least one master computer for the purpose of controlling the setpoints (for the control loops) .
  • the process parameters that are not directly influenced by the memory unit can be detected and used directly for assignment to control signals.
  • the pre given process parameters assigned group of input signal quantities expanded to the extent that it also takes into account other process variables, in particular operational process parameters and / or target variables.
  • the grain mill system is preferably further decentralized in that the assembly has a main computer which can be connected upstream of several control computers. This makes it possible to control several process zones via a main computer.
  • This main computer could e.g. B. have saved entire weekly or monthly production programs and run them automatically.
  • accounting tasks can also be assigned to the main computer.
  • the main computer therefore represents a fourth level within the hierarchical structure already described.
  • the management of the grain mill system according to the invention by the top miller is further facilitated and the decentralization and operational reliability are further increased in this case; in the event of errors, these can also be located more quickly.
  • control loops including control means, regulators and actual value sensors, are assigned to the outputs of the silo containers, the outputs of the stand-off cells and / or the inputs of the power supply units.
  • control means, the regulators and the actual value sensors for controlling or regulating the moisture of the unmilled material are designed in the grain mill system, then the actual value sensors are preferably designed as moisture measuring devices and arranged in front of the stand-off cells and / or in front of the depot B 1 .
  • the control means, the regulators and the actual value sensors are designed to control or regulate the pair of rollers.
  • At least one pair of rollers preferably has two control means that operate independently of one another with assigned controllers and actual value sensors, with one control loop at one end of the roller pair and the other control loop at the other end of the roller pair regulating the distance and / or the pressure.
  • roller pair This independence of the two control loops enables the roller pair to be optimally adapted to different load and / or wear conditions within a roller gap.
  • a flour or Gries brightness measuring device for determining and monitoring its brightness is assigned to each end product quality, the brightness measuring device being followed by control means for automatically controlling the mixing ratio of the individual passage flours in such a way that by measuring the flour or Grits brightness selectable predetermined mixtures of the end product can be put together or switched on.
  • the flour or semolina brightness of the flours leaving the individual passages are to be considered as given process parameters with regard to the brightness of a flour mixture or an end product to be maintained.
  • the measuring device is designed as a temperature measuring device for determining further process variables.
  • the sensor of the temperature measuring device is arranged in the wetting and / or roller grinding zone in the region of the regrind path.
  • the measurement signal output can be connected to a control input of at least one setpoint generator or a storage unit of the wetting zone and / or grinding zone. Since the temperature represents a not insignificant operational process parameter, it is important to take it into account in the grinding process. Through the above measure, the temperature in the specified process areas is also taken into account if it is not subject to an influence by the storage unit. The temperature in the grinding roller area is particularly important.
  • the sensor of the temperature measuring device is arranged in the grinding roller area and the measuring signal output of the temperature measuring device can be connected to the setpoint generator or the storage unit for the setpoints of the roll spacing and / or the roll impression.
  • the correct moisture content of the ground material before the first shot is essential for a good grinding result.
  • the measuring device is designed as a moisture measuring device, the measuring sensor of which is arranged in front of the stand-off cells or in front of the first shot and / or in front of a power supply unit and whose measuring signal output has a control input of at least one setpoint generator or a storage unit for the stand-off zone, Wetting zone and / or grinding zone is connectable.
  • the measuring device is designed as a pressure measuring device, the measuring sensor of which is arranged in the region of the grinding roller pair and whose measuring signal output is connected to a control input of at least one setpoint generator or a memory unit for the setpoint specification for controlling or regulating the roller spacing can be connected.
  • each controller is assigned to exactly one process element and its control means, the individual control loops being independent of one another and the setpoint generators of the controllers being externally controllable - also by hand.
  • the automation of the grain mill system serves the optimal division of labor between Obermüller and technology and is divided into different levels. Each level is fully functional and can be uncoupled from the respective higher levels. Interconnecting the levels leads to a particularly effective way of working the grain mill system.
  • a roller mill with gap control is automated so that it can function for itself without a higher-level storage unit, a master computer or a main computer.
  • the gap control on the roller mill is designed so that it can be controlled by a higher level of automation. It is also easily possible to combine individual groups of passages B 1 , B 2 ..., C 1 , C2 ... or individual groups of flow meters within the higher automation level.
  • the hierarchical structure broken down into the levels assigns the process elements or the individual machines with manual setting, control and locking to the first level.
  • the control loops of the individual process elements are located on the second level.
  • the third level is represented by the storage units which transfer several elements of the second level is arranged.
  • the host computers which can be connected directly upstream of the storage units are also assigned to the third level.
  • the fourth level is reserved for a main computer, which controls several process areas (e.g. cleaning, grinding zone). Accordingly, existing disturbance variables on the first or lowest level are not automatically corrected. In the second level, on the other hand, the disturbances influencing the controlled variables are automatically corrected.
  • the control loops of the second level are controlled from the third level.
  • the control loops or the controllers on the second level are designed so that they can receive external setpoints and - to write new setpoints into the storage system - can send actual values to the higher-level storage system.
  • a completely new grain mill system with the three hierarchical levels can be run in such a way that the miller first optimizes the grain mill system when the automatic system is switched off. This optimization can be carried out on the basis of the first level or with the aid of decentralized regulation on the second level. If the optimum is found, the current actual values are transmitted to the master computer. These values are now stored by the computer as setpoints for certain, precisely defined process parameters or the input signal quantities determined by them. In this way, associated optimal control signal or setpoint groups can be found and stored for various process parameters. Later, if a certain combination of process parameters occurs again (e.g. the same mix as two weeks ago), simply by entering the input signal assigned to these parameters sizes, the setpoint scheme found at that time is addressed, called up and transmitted to the individual machines.
  • process parameters e.g. the same mix as two weeks ago
  • the stored values can be transferred from one mill to another.
  • At least some controllers of the control circuits or parts thereof are structurally combined in the grain mill system according to the invention.
  • This preferably applies to those control loops which are assigned to the grinding roller control and the flow rate control.
  • each roller mill can be assigned its own controller including electronics.
  • 40 roller mills and 15 to 20 or more flow control devices are present in larger mills, for example, only actual value sensors and actuators are preferably arranged in the individual roller mills and / or means for controlling the flow rate.
  • the remaining parts of the control loops are combined in a common module. Only the actual value lines and the lines for the manipulated variables then lead from this module to the individual machines.
  • the individual controllers can be combined in a common module on the second level, ie on the level at which control is carried out. However, the controllers can also be combined in the next higher level, namely in the level in which the storage unit and the host computer are located. In this case, the controllers are preferably integrated in the host computer. According to the preferred exemplary embodiment mentioned above, there is therefore a structural summary of the controllers for the cleaning zone, in particular thus the controller for the flow rate control, and / or a structural one Summary of the controllers for the grinding zone, in particular the controller for the grinding roller setting, provided.
  • the respective adjustment means or actuators for the flow rate and / or grinding gap control can be controlled individually.
  • part of the function of the measuring devices can also be integrated in the master computer, the master computer then evaluating the values output by the measuring devices accordingly. Is z. If, for example, the measuring device is used to monitor a target value and the host computer detects a smaller deviation of the actual value (actually measured output variable) from the target value (target variable) by appropriate comparison, appropriate corrections are then made. For example, a deviation of the intended temperature by about 10 ° C can lead to a moisture addition of about 0.2%. If a target value for the flour brightness is specified, a flour that is too dark can be passed to another cell. However, if the effective deviation from the target value determined by the measuring device is too large, the grinder can be switched off via the host computer or directly by locking. The measuring devices are accordingly assigned an additional function insofar as they serve to monitor the mill. In a further development of the above, parts of the locking circuits, that is to say parts of the first level in the third level, can be integrated in the host computer.
  • the integration of the controller, measuring device and locking parts in the master computer is always carried out in such a way that, in the event of a failure or a malfunction of the remaining parts of the master computer, the control loop parts integrated therein Measuring device evaluation devices and / or locking parts can continue to work autonomously.
  • switching means can also be provided with which, for example, the third level (storage unit and host computer) can be connected directly to the first level (control means including locking).
  • a combination of several levels for example levels 2, 3 and 4, levels 2 and 3, levels 3 and 4, etc., can of course be carried out - possibly with a reduction in decentralization.
  • combining several levels in a single unit does not mean that decentralization is not always necessary. Rather, the levels can be combined in one structural unit, but can nevertheless be decentralized from the point of view of the circuitry. In such a case, one can still speak of individual, autonomous levels - despite the structural summary of the levels.
  • the silo zone shown in FIG. 1 represents the mill entrance.
  • Grain to be ground for example wheat
  • the grain is fed to the goods-in zone 100, for example by train or truck.
  • the grain is transferred from the goods-in zone 100 to a conveyor system 101, for example a chain transporter.
  • the chain transporter conveys the wheat to a height conveyor 102, also called an elevator.
  • the height conveyor 102 conveys the grain up several floors within a mill system.
  • the grain is then passed through a scale 103.
  • the amount of wheat introduced into the grain mill system is measured in the balance 103.
  • the ground material flow leads to a cleaning, separating and sieving device 104. In this device, the wheat is first cleaned. At the same time, a rough separation of the wheat from foreign elements is achieved, for example by rotating sieves
  • the wheat After passing through the cleaning, separating and screening device 104, the wheat is fed to a further height conveyor 105, which lifts the wheat and feeds it to a further conveyor system 107.
  • the conveyor system 107 guides the wheat into one or more input silos 108 arranged in sequence. In the exemplary embodiment shown, five input silos 108 are shown. Each silo has a capacity of approx. 300 tons.
  • the conveyor system 107 is designed such that a batch of wheat can be introduced into a predetermined input silo 108 with it. By means of the conveyor system 107, different filling quantities of the same wheat or similar types of wheat can therefore be entered into different silos, each intended for this purpose. Suitable silo outlets 109 on the bottom of the silos 108 open when activated accordingly.
  • the wheat can optionally be withdrawn from the individual silos 108 and run onto a further conveyor system 110, for example a chain transporter.
  • the conveyor system 110 conveys the wheat back to the height conveyor 102. After leaving the height conveyor 102, the grain again passes through the scale 103, the cleaning, separating and sieving device 104 and the height conveyor 105. This time, however, the wheat does not become the conveyor system 107 but another one Conveyor system 106 or 106 '(see FIG. 2) fed.
  • the wheat arrives in four short-term storage silos 111 via the conveyor system 106, 106 '.
  • the term short-term storage silo 111 was chosen because in the short-term storage silos 111 the cereal types and quantities required for a desired end product are usually stored only in the silos 111 for the duration of the grinding of the grain into this end product.
  • the scale 103 also serves to check the weight of the amount of grain removed from the silos 108.
  • the weight 103 is used to measure the weight of the amount of grain that is fed to the further grinding process.
  • Special silo outlets are provided on the bottom of the short-term storage silos 111, by means of which the silos can be emptied.
  • Flow rate control circuits 114 are shown between the silo outlets and a downstream further conveyor system 112, for example a tubular screw conveyor.
  • the flow rate control circuits 114 are explained in more detail with reference to FIG. 7.
  • the flow rate regulators regulate the wheat supply to the conveyor system 112, which passes into a further height conveyor 113.
  • a desired wheat mixture can also be fed to the conveyor system 112 by means of the flow rate control, if different types of wheat or cereals are stored in the short-term storage 111.
  • Elevator 113 conveys the wheat up to the top floor of a grain mill system. From there, the wheat first arrives at a scale W. After passing through the scale, the wheat is fed to a further cleaning, separating and screening device 115 known per se, the device 115 being able to be equipped with a so-called intermediate separator Z.
  • the wheat After passing through the cleaning, separating and screening device 115, the wheat passes through a stone reader 116.
  • the stone reader 116 is also known per se. It is used to remove stones or similar foreign bodies from the dry grain.
  • the dry stone reader 116 is also assigned an air cleaning device L, which preferably cleans the dust air via pneumatically operated filters.
  • trimmer 117 After passing through the stone reader 116, the grain arrives at a so-called trimmer 117, known per se, which removes seeds and other plant parts or similar foreign bodies from the grain. After passing through the drive 117, the wheat is essentially in pure form.
  • the now cleaned wheat arrives via a further height conveyor 119 into a wetting zone 120 and from there into resting cells 121 underneath.
  • the wetting zone 120 has a control circuit 123 for wetting. This control circuit is explained in more detail in FIG. 8.
  • the term wetting means moistening the grain.
  • the moisture content of the dry wheat is first measured in the wetting zone 120. Based on this measurement result, the amount of water required for further conditioning of the wheat is calculated. It is known that the best way to process wheat in a grain mill system is if it has a moisture content which, depending on the type of grain, is between 16 and 17%.
  • the water is added to the grain in a wetting device 122. After passing through the wetting device 122, the wheat arrives in the stand-off cells 121.
  • the wheat stands out, ie it lingers in the stand-off cells for a while with the water supplied to it.
  • the standby time is chosen so that the amount of water added from the wheat for the required moisture is practically complete is absorbed.
  • the wheat is then released from the bottom of the silos 121.
  • Flow rate control circuits 126 are again used for this purpose. These control loops 126 can be constructed in the same way as the flow rate control loops 114.
  • the grain passes to a further conveyor device 127, for example a tubular screw conveyor, and from there to a height conveyor 128.
  • a further conveyor device 127 for example a tubular screw conveyor, and from there to a height conveyor 128.
  • the wetting and standing process can also be repeated if the desired moisture between 16 and 17% cannot be reached by wetting and standing once.
  • the flow rate control circuits 126 provide a further possibility of mixing different types of wheat with one another, the individual types of wheat each having the same moisture content.
  • the amount of water to be added to the wheat depends on the initial moisture content of the wheat to be processed. If the wheat comes from a hot dry climate, more moisture must be added to maintain the desired moisture level. In this case, the aforementioned double wetting and standoff treatment can be carried out. If, on the other hand, the wheat or the grain has a higher moisture content, a single wetting with subsequent standing is sufficient.
  • the height conveyor 128 conveys the wheat to a scrubbing machine 129, which scrubs the surface of the wheat grains in a manner known per se.
  • the wheat is then fed to a surface wetting device 130, which is used for wetting in a manner known per se the wheat surface is lined with water. This increases the moisture content of the surface of the wheat grain husk.
  • the wheat is then fed to a depot B 1 131, ie another silo.
  • the wheat remains in the depot B 1 for a relatively short time, for example 30 or more minutes.
  • the moisture adhering to the surface of the wheat grains penetrates a little into the skin; the wheat swells. This process is also known per se.
  • the wheat is fed to a scale 132, which feeds it to the next stage, ie the roller mill or the roller mill B 1 .
  • the flow rate control loops 114 and 126 in the wetting and stand-off zone can be controlled by a common storage unit 42, optionally with a master computer 40.
  • the same also applies to the control circuit 123 for the N nuation.
  • An example of such a circuit is shown in FIG. 11.
  • control circuits 114, 123 and 126 for the flow rate control or for the wetting can be designed such that only one actual value sensor and one actuator is present on the respective machines, while all other parts of the control circuits or control chains are integrated in the control computer 42.
  • a line P for recording protocols also goes from the master computer 40, including the memory 42.
  • an input control line St i is also provided, which gives control signals to the host computer. Control signals of this type can be obtained, for example, from the measuring devices 45, which monitor target variables, or from sensors of other para meters out.
  • the output line Sto outputs control signals to locking elements and / or adjusting means for setting operational signals.
  • Pneumatic lines are also provided on the right in FIG. 2, which are used, for example, for air purification.
  • FIG 3 shows a mill diagram for the zone of grinding and extraction of the products by screening.
  • the wheat coming from the depot B 1 131 is first fed to the roller mill 200 or B 1 .
  • FIG. 5 shows a simplified section from FIG. 3 in the form of a flow diagram, the section having six roller mills B 1 , B 2 , B 3 , C1, C 2 , C 3 , six classifiers and two semolina cleaning machines. 5 is used for a better understanding of FIG. 2.
  • the section shown in FIG. 5 has three crushing roller mills 140, 141 and 142 together with associated sifters 143, 144 and 145.
  • the rollers of the crushing roller mills are called crushing rollers because they break the grain.
  • the crushing rollers have a corrugated surface. That is why they are also called corrugated rollers.
  • plan sifters can be used as sifters.
  • three grinding roller mills 146, 147 and 148 with associated sifters 149, 150 and 151 are provided.
  • the rollers of the grinding roller mills have a smooth surface; they are therefore also called smooth rolls.
  • Two Gries cleaning machines 152 and 153 are arranged between the crushing rollers and the smooth rollers.
  • roller mills, classifiers and Gries cleaning machines are known per se. According to the invention, however, their adjusting means are designed such that they can be controlled by the controllers 50, 50a, 50b, 50c and 50d symbolized in FIG. 3. They therefore represent actuators within a control loop. This is discussed in detail still received, for example based on the description of FIG. 11.
  • the material to be ground passes from the scale 132 to the first crushing rollers 140 and from there to the sifter 143.
  • the sifter 143 has two sieves, namely a first sieve 154 with approximately 30 wires per inch and an inch and a second Sieve 155 with a mesh size of approximately 150 microns.
  • the outputs 156, 157 and 158 of the screens 154 and 155 therefore give the so-called repulsion, i.e. H. the part that does not fall through the sieve (exit 156), semolina (exit 157) and flour (exit 158).
  • the flour coming out of the sieve outlet 158 is fed via an outlet line 159 to a container B 1 , for example another silo.
  • the repulsion emitted by the screen exit 156 is fed to the next break rollers 141.
  • the semolina discharged from the sieve passage 157 is fed to the semolina cleaning machine 152. There the semolina is cleaned, for example by aspiration, the wheat kernels and shell parts being fed to the outlet 161 and the semolina to the outlet 160.
  • the parts fed to the output 161 are then fed to the next crushing rollers 141 together with the repulsion at the output 156 of the classifier 143.
  • the pure semolina present at the outlet 160 is fed to the first pair of smooth rollers 146.
  • the material ground in the crushing rollers 141 is in turn fed to a classifier, namely the classifier 144, which has a first Siob 162 of approximately 36 wires per inch or inch and a second sieve 163 of approximately 132 microns mesh size.
  • the sifter 144 has an exit 184 for don rejection, an exit 165 for the semolina and an exit 166 for the end product flour.
  • the flour present at sieve exit 166 becomes an exit fed line 167 and fed into an end product container, for example a silo B 2 for the regrind coming from B 2 .
  • the repulsion pending at the exit 164 is fed to the last pair of crushing rollers 142 shown in FIG. 5.
  • the semolina present at the exit 165 is fed to the second semolina cleaning machine 153.
  • the outlet 168 there is pure semolina, which is fed to the second pair of smooth rollers 146.
  • the exit 169 of the grit cleaning machine 153 or S2 shell parts and remaining parts are in turn, which are fed to the last crushing roller mill 142.
  • the material ground in the last pair of crushing rollers 142 is fed to the sifter 145; the sifter 145 has a first screen 170 with about forty wires per inch or inch and a second screen 171 with a mesh size of about 132 microns.
  • the classifier 145 is equipped with an output 172, from which the repulsion is fed to an output line 173. Via the output line 173, the shell residues or the bran are again fed to a container provided for this purpose, for example in turn to a silo.
  • the classifier 145 is also equipped with a further output 174 for semolina, which is fed to the second classifier 153.
  • the end product flour is present at the exit 175 of the classifier 145 and is fed via the outlet line 176 to a silo which receives the flour ground by B 3 and is therefore called silo B 3 .
  • the product ground in the pair of smooth rollers 146 reaches the sifter 149, which has two screening stages 177.
  • the sieve stages 177 work in parallel and have a mesh size of approximately 150 ⁇ .
  • the classifier 149 is equipped with outputs 178 and 179. At the exit 178 there is the wire rejection, which is fed to the next pair of smooth rollers 157. Flour is present at the outlet 179, which is transferred to a container via an outlet line 180 flour is supplied for the end product.
  • This container is e.g. B. a silo C 1 .
  • the classifier 149 also has a coarse screen 181 which has approximately 40 meshes per inch. The rejection of this coarse screen 181 is fed to the last classifier 151.
  • the rejection of the coarse screen 181 consists essentially of shell parts. It can also contain a little flour, which is separated by means of the last classifier 151.
  • the regrind from the second pair of smooth rollers 147 is fed to the sifter 150, which also has two sieves 182.
  • Sieves 182 have a mesh size of approximately 132p. and work in parallel. Both screens 182 are repelled at exit 183; from there it reaches the last pair of smooth rollers 148.
  • Flour which is present at the exit 184 of the classifier 150, passes through an outlet line 185 into a corresponding container.
  • the sifter 150 also has a preliminary or coarse screen 186 with approximately fifty meshes per inch or inch. The rejection of the coarse screen 186 also reaches the last classifier 151.
  • the material emanating from the last smooth rollers 148 is fed to the classifier 151, which likewise has two screens 187 working in parallel. Each of these two sieves has a mesh size of approximately 132 microns. The discharge of these sieves passes through the outlet 188 and the outlet line 189 into a container for fine bran.
  • the flour obtained in the sifter 151 reaches a flour silo via the outlet 190 and the outlet line 191. From the above description it is apparent that the unmilled grain arriving at the first pair of crushing rollers 141 is successively broken, sifted and cleaned in order to obtain several flour qualities at the exits 159, 167, 176, 180, 185 and 181. These flour qualities are referred to in FIG. 5 as B1, B2, B3, C1, C2 and C3.
  • the flour is removed from the shell parts which are discharged through the output lines 173 and 179. . 5, only an extremely simplified embodiment of the grinding zone was explained.
  • the number of roller mills, classifiers and grout cleaning machines is usually considerably higher. This number depends on the one hand on the type of grain to be processed and the grain mill system used for this. Furthermore, the number depends on the amount of ground material to be processed and the desired end product.
  • the exemplary embodiment shown in FIG. 3 for the grinding zone has considerably more roller mills, classifiers and semolina cleaning machines, namely up to 20 cylinder mills 200, up to twenty classifiers 201 and up to ten semolina cleaning machines 202.
  • the controllers 50, 50a, 50b, 50c and 50d shown in FIG. 3 along with assigned switches 27, setpoint transmitters 52 and actual value feedback lines S 1 are explained in more detail with reference to FIGS. 1, 6 to 9 and 11. The same applies to the assembly 30 with the master computer 40 and the storage unit 42.
  • the individual controllers 50, 50a, 50b, 50c, 50d can also be combined in the grinding zone within the second level mentioned at the beginning or in the third level, ie in the master computer.
  • the summary of the controllers is preferably designed so that only the actual value sensor and the actuator or the servomotor are provided on the machine parts to be controlled.
  • the rest of the control loops are combined in a common module, be it in the second level or in the third level, ie in the host computer, and possibly integrated.
  • the summary is preferably designed so that each machine part can be controlled individually.
  • the control takes place in the roller mills preferably via the be knew roller adjustment means, which are however changed compared to the known adjustment means in that they can be controlled by control signals.
  • the module in which the controllers or parts thereof are combined is symbolized by block 500 in master computer 40 with memory 42.
  • a controller is assigned to all the roller mills and / or that all controllers are integrated in the module 500. It is often sufficient to regulate only a certain number of roller mills.
  • the conventional control or locking means which lock the individual machine parts together, can also be integrated in the master computer 40 insofar as the commands ON / OFF etc. originate from there.
  • the controller for the desired mixture outputs control signals to the mixing flaps I, II, III.
  • the flour brightness is measured by means of the brightness measuring devices 213 and, for example, fed to the master computer 40 and / or the controller 50n via the line 52n.
  • the quantities determined as actual values by means of the brightness measuring devices 213 are compared with target values. If the comparison leads to larger deviations, then the controller emits 50 n control signals for changing the mixing flap positions.
  • the necessary control signals can be determined, for example, by means of a program stored in the master computer 40.
  • the brightness measuring devices 213 are followed by scales 216, the measuring signal outputs of which are fed to a yield calculator 600.
  • the yield calculator gives the actual value as actual values in the guide calculator that compares these values with target values for the yield.
  • the feedback lines from the brightness measuring devices 213 and the yield computer 600 to the master computer 40 accordingly lead to constant monitoring of the system.
  • the master computer can assign a specific setting of the operational process parameters within the grinding zone - taking into account the specified final parameter values for quality, yield, etc. These assignments are for example, be printed on a Protokoltechnisch P, so that an increased transparency of the A rbeits-, the flour mill plant can be achieved.
  • the controller 50n provided for the flour mixing can also itself be designed as a programmable controller, wherein it outputs control variables for the mixing flaps depending on the measured brightness values of the flours.
  • the aforementioned integration of the controller parts, timing chain parts and locking parts in the host computer means that if the actual output variables deviate too much from the target values, control signals are first used to try to reduce the deviation, an alarm signal is given and / or the mill is switched off becomes.
  • the components shown with the reference symbol L essentially serve to purify the air flowing through the mill system.
  • the part of the mill diagram shown in FIG. 4 of the grain mill system according to the invention serves to store and pack the mill products which were obtained in the grinding and classifying zone according to FIGS. 3 and 5.
  • the flour present at the exits of the grinding zone according to FIG. 3 is in three qualities 1, 2 and 3 and reaches the silo zone according to FIG. 4 in these three qualities the three flour qualities are fed via lines 218 by means of pneumatic height conveyors 219 to a group of silo containers 220 for the end products.
  • the lines 218 are connected to the pneumatic elevators 219 via air locks 221. Compressed air is fed to the pneumatic elevators via valves 222.
  • the three different flour qualities in the three lines 218 can be mixed in different proportions and introduced into the individual silos 220.
  • Vibratory discharge funnels 223, ie funnels which are subjected to an oscillatory movement, are provided on the bottom of each silo 220.
  • the flour is fed from the vibrating discharge hopper 223 to a conveyor system 224. From there it reaches a further conveyor system 226 via a height conveyor 225.
  • flow-rate regulators by means of which a further mixing of the flours is possible, can in principle also be connected downstream of the vibrating discharge funnels 223.
  • the flour can either be fed back into the silos, a further mixing effect being possible.
  • the flour can also be fed to a constant level container 227, which is known per se.
  • the constant level container 227 is upstream of a weighing machine with a packing machine.
  • the packing machine 228, which is known per se the flour is packaged in sacks and provided for transport by the grain mill system.
  • the conveyor system 226 can also feed the flour to another discharge, from which it is filled directly into containers, for example into containers on trucks or railroads.
  • silo container 229 with associated collecting and conveying lines, height conveyors and further devices for storing bran or other material that falls off in the individual process stages is also provided.
  • This material is fed to silo container 229, for example, via output lines 173 and 189 in FIG. 5. It can be used as animal feed or for other purposes.
  • the dashed lines illustrate the possibilities of intervention of the upper miller M in the inventive grain mill plant.
  • the dash-dotted lines illustrate the interactions between the machine park and its control means, including the locking system known per se with the assembly.
  • the solid lines represent the signal flow between the elements of the assembly 30.
  • the grain mill system according to the invention has a machine park 12, the locking unit 14 known per se for controlling the machine park and actuators 16, including servomotors and actuators. These three units are combined as a system plus control 10.
  • the system plus control system 10 comprises the entire silo section.
  • the system plus controller 10 can be switched on via the first switches 20 and 26 of the assembly 30.
  • the connection is performed by the upper Müller M.
  • the module 30 comprises as shown in FIGS. 11 the control computer 40, which controls the memory unit 42, also called the setpoint memory 42.
  • the setpoint memory 42 specifies setpoints to the controllers 50 1 to 50n in accordance with the command from the host computer.
  • the controllers 50 1 to 50n intervene in process zones 51 1 to 51. n
  • the grain mill system according to the invention preferably has three control computers with subordinate components as shown in FIG. 11, one control computer being assigned to exactly one process zone, namely the silo, cleaning and actual mill zone.
  • the assembly 30 has a main computer 60 which interacts with two or more master computers including downstream components according to FIG. 11.
  • the method area shown in FIG. 11 has the actuators 16 according to the invention and the locking unit 14 known per se.
  • the be in itself Known locking unit 14 can be operated directly by Obermüller M. If the top miller M switches on at least one switch 26 1 and / or 26n via the engagement line M 3 , then a connection is established between at least one controller 50 1 to 50n, at least one process zone 51 1 to 51n and that of the system controller 16 including the lock 14 . This connection creates at least one control loop. For reasons of clarity, the comparator and the control amplifier are not shown separately in the figure.
  • each controller for example controller 50n, receives the nth actual value, determines the control deviation and transmits a corresponding manipulated variable to the system controller 16, including the lock 14. This regulates the controlled variable.
  • the controller 50 1 to 50 n can be given the setpoint manually by the top miller M via the line M 4b .
  • separate setpoint transmitters 52 1 to 52n are provided.
  • second switches 27 1 to 27n must be switched accordingly by the upper miller M in order to establish a connection between the setpoint transmitters 52 1 to 52n and the corresponding controllers 50 1 to 50n.
  • the switches 27 1 to 27n are switched in such a way that a connection between the controllers 50 1 to 50n and the setpoint memory 42 is established.
  • At least one setpoint representative control signal is stored in the setpoint memory 42 for each controller 50 1 to 50n.
  • several setpoints or control signals are stored for each controller 50 1 to 50n, the selection of the setpoint to be given to the controller either by appropriate addressing of the memory location by the Obermüller M or by addressing using a or several measuring devices 45 or by addressing by the input signal quantity group.
  • the measuring devices 45 measure operational process parameters, for example temperature, humidity and / or pressure in the grinding roller gap, and / or target values.
  • setpoints or control signals are controlled in the setpoint memory 42 by the outputs of the measuring devices 45, which Obermüller M had previously stored as optimal under the given process conditions.
  • Such optimum values are stored, for example, in that the top miller first regulates the controlled variables by hand until he obtains optimal results and then outputs these results as setpoints for the further process in the setpoint memory 42.
  • the lines S 1 and Sn are provided for this purpose.
  • the "actual value” optimally set by the Obermüller thus becomes the new "target value” or a new control signal after being stored in the target value memory 42.
  • the master computer 40 is connected upstream of the setpoint memory 42.
  • the host computer 40 is designed so that it is specified when entering or entering process variables, for. B. type of grain, type of grain, grain mixture and / or desired end product, etc. addresses the corresponding storage locations in the setpoint memory 42 and thereby a setpoint specification corresponding to these storage locations for the controller 50 . up to 50n.
  • the master computer 40 must first of all receive the input signal quantities from Obermüller M which are those just mentioned are assigned to predetermined process variables. From these input signal variables, he formulates the address signals for the corresponding control signal representative setpoint values.
  • connection of the master computer 40 in front of the setpoint memory 42 has the advantage that the miller is easier to adjust the mill system at a later point in time if the same or similar predetermined process variables are available.
  • the top miller M only has to give the corresponding inputs to the control computer 40, whereupon the latter then automatically selects the correlated target values.
  • the measuring devices 45 can also first control the master computer 40 with the measured values for the operational process parameters and / or target variables, whereupon the master computer 40 then the corresponding correction target values in the target value memory 42 selects and causes them to be output as setpoint values for the controllers 50 1 to 50n.
  • Reference number 43 contains a setpoint diagram in the setpoint memory, i.e. symbolizes a control signal group, with for example each row being assigned a group of input signal quantities and each column being assigned a group of control signals (setpoints). Such a scheme can be implemented, for example, by a punch card.
  • connection AS is provided between the system controller 16, including the lock 14 and the setpoint memory 42.
  • the setpoint memory 42 can be addressed directly via this line AS, for example as a function of the respective process status of the grinding process. This applies ins especially for the start-up and phase-out phase. As a result, the target value memory 42 can be given specific target values that are separate for these phases.
  • These setpoints are then so-called reference variables, since they are at least presented as functions that change over time.
  • the above-mentioned feedback between the setpoint memory 42 and the system control, including the lock 14, also serves for an emergency that may occur, which would necessitate an immediate shutdown of the assembly.
  • the feedback AR between the controllers 50 1 to 50 n and the system controller 16, including the lock 14, serves the same purpose.
  • the switch 26 a is used to switch from manual to automatic via the access M 2 , 3.
  • the connecting line AV is provided in a manner known per se.
  • the top miller M has direct access to all components, so that he can intervene at any time in a controlling manner.
  • the exemplary embodiment shown schematically in FIG. 12 differs essentially from the exemplary embodiment according to FIG. 11 in that a master computer 60 is superordinate to the master control computer (s) 40.
  • the main computer 60 can also be connected to the process areas 30a via third switches 62 1 to 62n. These switches are also accessible for direct access by the upper miller M.
  • the main computer 60 is also via an ON-OFF switch 63 can be operated by Obermüller M.
  • the output variables of the measuring devices 45 for the process variables are fed to the main computer 60.
  • the latter processes the values supplied to it for forwarding to the master computer 40, controlling the setpoint memories 42 and controlling the control chains and / or control loops.
  • the exemplary embodiment according to FIG. 13 differs essentially from the exemplary embodiment shown in FIG. 12 in that the main computer is integrated with the system control and locking to form a unit 70.
  • main computers are preceded by a main computer which, for example, specifies weekly programs, monthly programs, etc.
  • the main computer, the control computer and / or the collective memory can be connected to the outputs of the measuring devices for operational process parameters, specifically for the selection and / or correction of setpoint values or control signals.
  • the "hierarchical levels" are all connected to one another via switches which can be operated by the top miller. It is also essential that the hierarchical levels are fed back to one another in such a way that in the event of an error in one of the levels, the next lower level is automatically decoupled from the higher level. This point of view applies not only to the levels as a whole, but also to individual sections or control loops within or between the levels.
  • the connecting elements between the levels and within the levels are implemented in digital technology.
  • FIGS. 14 and 15 illustrate schematic flow diagrams of the process control or an exemplary embodiment for a matrix-based memory unit 42.
  • a group of selected process variables is evaluated quantitatively and qualitatively and as a group of input signal variables Q 1 , M 1 , ..., Qn, Mn of the storage unit 42 supplied.
  • This group of input signal quantities serves as an address signal for addressing or selecting control signals St o11 ,... St o1n previously stored in the memory unit 42.
  • the control signals correspond to the setpoints in the control loops or to a predetermined change in the control characteristic of control chains.
  • the control chains and / or control loops are designed to influence operational process parameters that can be directly assigned to the process elements.
  • the storage unit 42 is designed as a three-dimensional matrix-shaped storage unit.
  • qualitative and quantitative evaluations of the predetermined cereal mixtures M 1 , M 2 and M 3 and the quality of the mixture or of the mixture proportions Q 1 , Q 2 and Q 3 are provided as input signal variables.
  • the input signal quantity group M 1 , Q 1 is assigned to a control signal quantity group St o11 , ..., St o1n provided in a vertical column. This control signal quantity group then influences the operational process parameters.
  • the input signal quantities Q 1 to Q 3 can also be target quantities for desired flour qualities.
  • the following table shows an example of an association between some predefined process variables (input signal variables) and some operational process parameters (control signals or memory data).
  • the table is only an illustration and does not claim to be complete.
  • FIG. 9 shows an exemplary embodiment of the arrangement shown in FIG. 3 for the automatic mixing of the passage flours into three flour qualities on an enlarged scale.
  • the passage flours are fed through flow slide valves 210 via the output lines 159, 167, 176, 180, 185 and 181 (cf. FIG. 5).
  • the slide valves are designed as three-way control valves in such a way that the incoming passage flours are directed in three different directions and can be fed to the three conveyor systems 211.
  • the conveyor systems 211 are preferably designed as tubular screw conveyors. As a result, the supplied portions of the passage flours are mixed. Accordingly, by appropriately controlling the slide valves 210, different mixture proportions can be supplied to the three delivery systems 211.
  • the conveyor systems 211 are preferably subjected to vibration, which leads to better mixing.
  • the brightness measuring devices 213 already mentioned are arranged downstream of the outputs 212 of the conveyor systems 211.
  • the output signal quantities of the measuring devices 213 are recorded within the electronic circuits 214 and supplied in the form of electrical signals 215 via the lines 52n de shown in FIG. 3 de controllers 50n provided for the mixture and / or the master computer 40.
  • the controller 50n and / or the master computer determine by comparison the deviation of the actual brightness signal from the target variable or the target value for the flour brightness and emit a corresponding manipulated variable signal to the mixing flaps of the flow sliding valves.
  • the grain mill system is switched off.
  • the end product runs through the scales 216 already mentioned and from there into the outlet lines 218.
  • the scales in turn feed weight-representative signals of the end product from the yield calculator 600.
  • the output signals of the yield computer 600 are fed to the master computer 40, which in turn makes a comparison between the target quantity and the actual yield of white flour and, depending on the comparison result, outputs control signals to the slide valves.
  • the Lcit computer is designed in such a way that, in the event of major deviations in the actual yield from the desired yield, it influences the grinding roller setting via control signals, emits an alarm and / or switches off the mill or parts of the mill via locking.
  • FIG. 6 A further exemplary embodiment for the control of an operational process parameter, namely the roll gap, is shown in FIG. 6, the roll gap itself being subjected to regulation by means of a control loop, but the controller of the control loop being controlled.
  • 6 shows a pair of rolls designed as a roll set.
  • the pair of rollers shown has a right grinding roller 230 and a left grinding roller 230 '.
  • the grinding rollers are rotatably supported in roller housings 232 and 233.
  • the roller housings in turn are fastened to a tie rod 234 via bolts 235, 235 '.
  • the attachment is carried out so that the right grinding roller 230 is pivotable relative to the left grinding roller 230 'within its associated housing. This swiveling allows a change of the roll gap.
  • the left grinding roller 230 ' is held in an upright position by a pin 231 provided in addition to the pin 235'.
  • the two bearing housings 232 and 233 are mutually adjustable by means of a guide spindle 236.
  • a rotation of the. Guide spindle 236 changes the nip.
  • an electric servo motor 238 is provided, which serves as an actuator and via a suitable sub gearing attacks on the lead screw 236.
  • a servo amplifier is connected upstream of the servo motor.
  • the servo motor 238 acts as an actuator in the control loop to be described.
  • a handwheel 239 is also provided, with the aid of which the guide spindle 236 can also be rotated, likewise via a corresponding reduction gear.
  • the roller spacing is accordingly adjustable by handwheel 239 from Obermüller or by servo motor 238.
  • a proximity switch consisting of the transmitting part 240 and receiving part 241, is arranged at the upper end of the bearing housing 232, 233. This proximity switch emits an electrical signal which corresponds to the distance between its transmitter 240 and its receiver 241. Since the proximity switch 240, 241 is firmly connected to the bearing housings 232, 233, the signal emitted by the proximity switch corresponds at the same time to the distance between the two rollers.
  • Proximity switch 240, 241 which is designed as a transmitter and receiver, can also be replaced by another suitable proximity measuring device.
  • the controller 50 already shown in the figures described above comprises a comparator or comparator for a comparison between the actual value and the setpoint, a downstream signal amplifier and a converter for emitting a suitable manipulated variable, i. H.
  • the controller output is fed to the servo motor 238 via the line 24.
  • the servo motor can be decoupled from the controller 50 by means of the switch 26 already described, for example for the purpose of a desired manual setting of the grinding roller gap using the handwheel 239.
  • the signal emanating from the proximity switch 240, 241 is fed as an actual value via line 57 to the controller input.
  • the comparator it is then with a setpoint compared which is given to controller 50 via line 53 (see FIG. 11).
  • the setpoint can be adjusted using Mand's M4b input. However, it can also be specified by the memory unit or a collective data memory for setpoints 42 when the switch 27 is closed.
  • the setpoint generator 52 can therefore be controlled directly by the Obermüller.
  • the setpoint value 52 can be controlled by the memory unit 42.
  • the memory unit 42 is connected upstream of the master computer 40. The values determined by quantitative and qualitative evaluation of the predetermined mixture and quality are input to this master computer 40 as input signal quantities. This group of input signals then serves as an address signal for the setpoint of the roller spacing.
  • the storage unit 42 is followed by a series of further regulators 50 for regulating further process parameters, for example further roll gaps. Because the use of a memory for controlling only a single process variable within the entire mill system would not be justifiable for economic reasons. Furthermore, the output signals of a temperature measuring device 45 T and a pressure measuring device 45 D can be supplied as address signals. The sensors of these measuring devices are symbolically identified by the reference numerals 242 and 243.
  • the line S 1 (cf. FIG. 11) is provided, which detects the signals emitted by the receiver part 241 of the proximity switch 240, 241 Master computer 40 supplies. This then writes corresponding control signal representative setpoint values into the storage unit 42. Accordingly, the upper miller, for example by turning handwheels 239, can adjust the nips of several grinding roller pairs until he has found optimal values, and then write these settings into the storage unit 42 via line 57, S 1 .
  • Each pair of rollers shown in Figures 3 and 5 can be equipped with a controller in this way.
  • the controllers can then be connected together with the master computer 40 or the storage unit 42.
  • the controllers 50 can also be integrated in the master computer, which is particularly advantageous when there are twenty or more pairs of rollers to be controlled.
  • roller pairs are exemplary embodiments for the process zones 51 1 to 51 n shown in FIG. 11. Further correlations between the embodiment shown in FIG. 6 and FIG. 11 can be seen in that corresponding parts have been given the same reference numerals.
  • the exemplary embodiment mentioned above showed a control loop within the grinding zone.
  • FIG. 7 Another exemplary embodiment of a controllable control loop within the cleaning zone is illustrated with reference to FIG. 7.
  • the regulation made here relates to the flow quantity regulation, which has already been mentioned in FIG. 2.
  • Each flow rate control circuit 114 in this case has a pivotably arranged plate 250 which is elastically biased against an angular deflection.
  • the grain flow impinging on plate 250 exerts a torque on plate 250.
  • the angular deflection of plate 250 is converted into an electrical signal and fed to controller 50 via line 57 1 .
  • the controller 50 receives a setpoint signal via the line 53 1 , which is specified by the memory unit 42 in the position of the switch 27 1 shown. - In the other position of the switch 27 1 , the setpoint signal is set by the setpoint generator 52 1 .
  • the line S 1 leads to the storage unit 42, possibly via the control computer 40, and is used to write new control signals representative of the setpoint into the storage unit 42.
  • any desired grain mixture can be fed to the conveyor system 112 by specifying corresponding setpoints.
  • the controllers are also integrated in a common module, this integration being able to be carried out both on the second level, that is to say the control loop level, or also in the third level, in this case in the host computer.
  • the switch 27 1 in turn enables the second level, ie the control loop level, to be switched off from the third level, ie from the host computer and for the storage unit.
  • a switch corresponding to the switch 26 1 in FIG. 11 between the controller 50 and the control means of the flow rate control circuit would make it possible to decouple the second level from the first level.
  • FIG. 2 A further exemplary embodiment of the control of a grain mill system according to the invention is represented by the regulation or control of the grain moisture shown in FIG. 8.
  • FIG. 2 is used here.
  • the grain to be moistened is first passed through a moisture meter 260.
  • the moisture measuring device 260 emits an electrical signal via the line 261, which corresponds to the moisture content of the grain being fed.
  • the amount of water that is required to achieve the desired moisture content is calculated. This calculation is carried out either in a local, permanently programmed computer 263 provided for this purpose, or, for example, in the host computer 40.
  • the moistening, ie the wetting of the grain is carried out using the power supply unit 122.
  • the required amount of water can be specified, for example, as a setpoint for a water flow rate controller will. If the calculation is carried out in the control computer 40, the switch 27 2 is switched to the position shown in FIG. 8. If the setpoint for the water flow rate is to be predetermined by manual testing, then the switch 27 2 is switched to the lower, dashed position. If the setpoint for the water flow rate is determined by the computer 263, the switch 27 2 is in the middle position. When calculating the setpoint value for the water flow rate, the flow rate of the grain is generally also taken into account.
  • the controller 50 2 is provided to regulate the water flow rate. The setpoints are specified for this controller via line 53 2 . The controller receives the actual value via line 57 2 .
  • the actual value line ends at a measuring device within a valve 264 for controlling the flow rate.
  • the error signal is determined in the controller 50 Z by comparison between the actual value and the target value, and the manipulated variable is derived from this error signal and is fed to the control valve 264 via the line 266.
  • line S 2 is again provided, which is connected to a corresponding write input of memory unit 42 or to master computer 40. Via the line S 2 , a flow rate value can be written into the memory which is representative of an optimal water flow.
  • the control valve 264 for controlling the water flow rate is again controllable by hand, so that the top miller can also intervene directly in the lowest level of the hierarchical structure. Accordingly, the water flow rate can also be controlled both from the first level, from the second level and from the third level, optionally also from the fourth level.
  • the parameters mentioned in the description line for example the relative air humidity and the temperature
  • further input signal variables for example quantitative and qualitative values, which are assigned to the type of grain, the grain quality, etc. -, are used as address signals for addressing a corresponding setpoint representative control signal in the memory unit 42.
  • the address inputs of the memory unit or the master computer can be provided with visual displays, so that the top miller can always control which process elements he assigns control signals and which process variables he started with.
  • a writing device or protocol device can be connected to the master computer, which records the input variables, the control signals and the output variables achieved. This measure serves the further transparency of the management of a grain mill plant.
  • the memories are preferably designed as digital memories, with correspondingly digitized input variables being specified and digitized control signals being output from the memory.
  • a security module which in turn has corresponding locking elements and / or the first, second and third switching devices 26, 27 and 62 in the sense of switching off or disconnecting.
  • the start-up phase can also be controlled in this way.
  • a clock is suitable for checking the states of the individual process elements in the above sense, by means of which the individual process elements are cyclically queried for compliance with states or process parameters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Drying Of Solid Materials (AREA)
  • Feedback Control In General (AREA)
EP79105351A 1978-12-22 1979-12-22 Procédé et installation pour la mouture de céréales Expired EP0013023B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2855715A DE2855715C3 (de) 1978-12-22 1978-12-22 Getreidemühlenanlage zur Herstellung von Mehl
DE2855715 1978-12-22

Publications (2)

Publication Number Publication Date
EP0013023A1 true EP0013023A1 (fr) 1980-07-09
EP0013023B1 EP0013023B1 (fr) 1982-10-20

Family

ID=6058138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79105351A Expired EP0013023B1 (fr) 1978-12-22 1979-12-22 Procédé et installation pour la mouture de céréales

Country Status (11)

Country Link
US (1) US4363448A (fr)
EP (1) EP0013023B1 (fr)
JP (1) JPS55116448A (fr)
BR (1) BR7908507A (fr)
DD (1) DD148304A5 (fr)
DE (2) DE2855715C3 (fr)
ES (1) ES8101410A1 (fr)
GB (2) GB2044481B (fr)
PL (1) PL132265B1 (fr)
SU (1) SU1340574A3 (fr)
ZA (1) ZA797034B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986001128A1 (fr) * 1984-08-03 1986-02-27 Gebrüder Bühler Ag Dispositif de reglage de l'ecartement de mouture pour moulins a cylindres
WO1986005416A1 (fr) * 1985-03-15 1986-09-25 Gebrüder Bühler Ag Procede d'ajustement des cylindres broyeurs des moulins a cylindres d'une installation de mouture de cereales, installations de mouture de cereales utilisant ce procede
FR2685223A1 (fr) * 1991-12-23 1993-06-25 Framatome Sa Installation de traitement de grains vegetaux ou de graines vegetales.
FR2685222A1 (fr) * 1991-12-23 1993-06-25 Framatome Sa Procede de traitement de grains vegetaux ou de graines vegetales et produits obtenus par ce procede.
WO1997041956A1 (fr) * 1996-05-03 1997-11-13 Braibanti Golfetto S.P.A. Procede de regulation automatique de la mouture au sein d'une minoterie et installation pour la mise en oeuvre dudit procede
DE102008040095A1 (de) * 2008-07-02 2010-01-07 Bühler AG Regelsystem für Getreide-Verarbeitungsanlage
WO2014187799A1 (fr) * 2013-05-22 2014-11-27 Bühler AG Dispositif et procédé permettant d'optimiser la mouture de céréales ainsi que système de commande de moulins correspondant
KR20190126352A (ko) * 2017-03-13 2019-11-11 제네럴 일렉트릭 테크놀러지 게엠베하 분쇄기 밀 내에서 재료 베드 깊이를 조절하기 위한 시스템 및 방법
WO2019223930A1 (fr) 2018-05-25 2019-11-28 Bühler AG Broyeur à grains et broyeur à rouleaux comportant plusieurs passages de broyage pour optimiser la mouture du matériau à broyer, et procédé correspondant

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60216844A (ja) * 1984-04-13 1985-10-30 Nippon Shokubai Kagaku Kogyo Co Ltd エチレンオキシド製造用銀触媒
AT389653B (de) * 1985-09-10 1990-01-10 Schroedl Hermann Verfahren zur einstellung der spaltweite eines kegelbrechers od.dgl.
DE68918701T2 (de) * 1989-12-13 1995-02-09 Satake Eng Co Ltd Mahlvorrichtung und System dafür.
DE4129898C2 (de) * 1991-09-09 1994-10-13 Graef Dieter Otto Verfahren zum Vermahlen von Körnerfrüchten sowie Vorrichtung zur Durchführung des Verfahrens
CA2065506C (fr) * 1992-04-07 1997-05-27 Richard Nolin Methode et appareil de fragmentation de blocs de matiere vegetale geles
US20040258807A1 (en) * 2003-06-20 2004-12-23 Deere & Company, A Delaware Corporation Method and system for management of the processing of agricultural products
US20050004682A1 (en) * 2003-07-01 2005-01-06 Deere & Company, A Delaware Corporation. Computer-assisted management of the processing of an agricultural product
DE10344040A1 (de) * 2003-09-23 2005-04-14 Polysius Ag Verfahren und Vorrichtung zur Herstellung eines hydraulischen Bindemittels
US20070170291A1 (en) * 2006-01-23 2007-07-26 Naganawa Mauro M Cracking mill for grains of soy, wheat, and others
US20080171114A1 (en) * 2006-12-20 2008-07-17 Castillo Rodriguez Francisco B Process for the production of refined whole-wheat flour with low coloration
DE102007002243A1 (de) 2007-01-10 2008-07-17 Bühler AG Verfahren zum Betreiben einer Anlage
WO2013135308A1 (fr) * 2012-03-16 2013-09-19 Bühler AG Dispositif et procédé pour un processus optimisé de mouture de céréales, ainsi que produit de programme par ordinateur correspondant pour la commande du dispositif
CN107861540A (zh) * 2017-11-16 2018-03-30 常德科祥机电制造有限公司 一种谷物烘干机自动控制装置及其控制方法
CN111565851B (zh) 2017-11-23 2021-10-08 布勒有限公司 用于辊系统的研磨线的自动优化和控制的智能的自适应控制装置及对应的方法
BR102021003370B1 (pt) * 2021-02-23 2022-04-05 Bunge Alimentos S/A Sistema e método de quebra de grãos
CN116159672B (zh) * 2023-03-01 2024-01-05 湖南中科电气股份有限公司 一种基于石墨化材料分选的磁选系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413956A1 (de) * 1973-03-23 1974-09-26 Simon Ltd Henry Getreidemahlverfahren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713460A (en) * 1952-02-28 1955-07-19 Atkinson Milling Company Method for regulating pressures on milling rolls
US2847167A (en) * 1954-12-16 1958-08-12 Gen Mills Inc Milling process for wheat and similar granular food products
CH619157A5 (fr) * 1976-07-16 1980-09-15 Buehler Ag Geb

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413956A1 (de) * 1973-03-23 1974-09-26 Simon Ltd Henry Getreidemahlverfahren

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986001128A1 (fr) * 1984-08-03 1986-02-27 Gebrüder Bühler Ag Dispositif de reglage de l'ecartement de mouture pour moulins a cylindres
US5154364A (en) * 1984-08-03 1992-10-13 Buehler Ag Grinding gap adjusting device for milling roller mills
WO1986005416A1 (fr) * 1985-03-15 1986-09-25 Gebrüder Bühler Ag Procede d'ajustement des cylindres broyeurs des moulins a cylindres d'une installation de mouture de cereales, installations de mouture de cereales utilisant ce procede
US4881689A (en) * 1985-03-15 1989-11-21 Gebrueder Buehler Ag Method for setting the grinding rollers in roller frames of a flour milling plant, as well as flour milling plant for performing the method
FR2685223A1 (fr) * 1991-12-23 1993-06-25 Framatome Sa Installation de traitement de grains vegetaux ou de graines vegetales.
FR2685222A1 (fr) * 1991-12-23 1993-06-25 Framatome Sa Procede de traitement de grains vegetaux ou de graines vegetales et produits obtenus par ce procede.
US6012661A (en) * 1996-05-02 2000-01-11 Braibanti Golfetto S.P.A. Method for automatically controlling grinding within a milling plant, and plant for implementing the method
WO1997041956A1 (fr) * 1996-05-03 1997-11-13 Braibanti Golfetto S.P.A. Procede de regulation automatique de la mouture au sein d'une minoterie et installation pour la mise en oeuvre dudit procede
DE102008040095A1 (de) * 2008-07-02 2010-01-07 Bühler AG Regelsystem für Getreide-Verarbeitungsanlage
WO2014187799A1 (fr) * 2013-05-22 2014-11-27 Bühler AG Dispositif et procédé permettant d'optimiser la mouture de céréales ainsi que système de commande de moulins correspondant
KR20190126352A (ko) * 2017-03-13 2019-11-11 제네럴 일렉트릭 테크놀러지 게엠베하 분쇄기 밀 내에서 재료 베드 깊이를 조절하기 위한 시스템 및 방법
KR102504925B1 (ko) 2017-03-13 2023-02-28 제네럴 일렉트릭 테크놀러지 게엠베하 분쇄기 밀 내에서 재료 베드 깊이를 조절하기 위한 시스템 및 방법
WO2019223930A1 (fr) 2018-05-25 2019-11-28 Bühler AG Broyeur à grains et broyeur à rouleaux comportant plusieurs passages de broyage pour optimiser la mouture du matériau à broyer, et procédé correspondant
KR20210011990A (ko) * 2018-05-25 2021-02-02 뷔홀러 아게 제분 재질의 최적화된 제분을 위한 여러 제분 패시지를 가진 곡물 제분기 및 롤 스탠드와 그에 대응하는 프로세스
KR102430868B1 (ko) 2018-05-25 2022-08-09 뷔홀러 아게 제분 재질의 최적화된 제분을 위한 여러 제분 패시지를 가진 곡물 제분기 및 롤 스탠드와 그에 대응하는 프로세스
US11618033B2 (en) 2018-05-25 2023-04-04 Bühler AG Cereal mill and roll stand with several milling passages for optimised milling of milling material and corresponding process

Also Published As

Publication number Publication date
GB2044481A (en) 1980-10-15
US4363448A (en) 1982-12-14
ES487229A0 (es) 1980-12-16
ZA797034B (en) 1981-08-26
DE2855715C3 (de) 1982-05-19
DE2855715B2 (de) 1981-08-06
ES8101410A1 (es) 1980-12-16
PL132265B1 (en) 1985-02-28
PL220703A1 (fr) 1980-10-06
JPS6332504B2 (fr) 1988-06-30
DE2963911D1 (en) 1982-11-25
DD148304A5 (de) 1981-05-20
SU1340574A3 (ru) 1987-09-23
GB2111721B (en) 1983-11-16
GB2044481B (en) 1983-07-20
JPS55116448A (en) 1980-09-08
EP0013023B1 (fr) 1982-10-20
GB2111721A (en) 1983-07-06
DE2855715A1 (de) 1980-06-26
BR7908507A (pt) 1980-07-22

Similar Documents

Publication Publication Date Title
EP0013023B1 (fr) Procédé et installation pour la mouture de céréales
EP0336939B1 (fr) Procede de fabrication de l'amidon brut et moulin a amidon
EP1763988B1 (fr) Procédé de régulation d'un organe de travail d'une récolteuse agricole
EP3713671B1 (fr) Dispositif de commande inteligent et auto-adaptatif pour optimisation automatisée et commande d'une ligne de mouture d'un système de rouleaux et procédé correspondant
EP3801909A1 (fr) Broyeur à grains et broyeur à rouleaux comportant plusieurs passages de broyage pour optimiser la mouture du matériau à broyer, et procédé correspondant
EP0215865B1 (fr) Procede d'ajustement des cylindres broyeurs des moulins a cylindres d'une installation de mouture de cereales, installations de mouture de cereales utilisant ce procede
DE4005323A1 (de) Verfahren und mahlanlage zur zweistufigen zerkleinerung von sproedem mahlgut
DE10218424A1 (de) Schrotmühle sowie Verfahren zur Zerkleinerung von Mahlgut
EP2318142A1 (fr) Système de régulation pour une installation de transformation de céréales
DE2807691B1 (de) Verfahren und Vorrichtung zur Regelung der Feinheit von Fertiggut aus einer Mahlanlage
AT1073U1 (de) Verfahren und vorrichtung zum mahlen von teilchenförmigem aufgabegut
DE1583773A1 (de) Steuervorrichtung fuer schnell laufende magnetische Trommel-Separatoren
DE2741510A1 (de) Verfahren und regelanordnung zur durchsatzregelung einer sichterumlaufmahlanlage
DE3519625A1 (de) Verfahren zum einstellen der mahlwalzen bei walzenstuehlen einer getreidemuehlenanlage sowie getreidemuehlenanlage zur durchfuehrung des verfahrens
DE19806895C2 (de) Verfahren und Vorrichtung zum Optimieren des Mahlbettes von Walzenschüsselmühlen
WO2023212830A1 (fr) Broyeur autonome et procédé de broyage
DE2943597C2 (de) Vollernter für Maiskolbenschrot
DD282861A5 (de) Verfahren und Getreidemühle zur Herstellung von Getreidemahlprodukten
CH528302A (de) Laborgetreidemühle
DE4025995A1 (de) Mahlanlage fuer lebensmittelprodukte, insbesondere fuer kaffee, mit gesteuertem anteil an pulver des gemahlenen produktes
DE112004000382T5 (de) System zum Bilden einer Prozessbeschickung
DD275414A1 (de) Saatgutbereiter fuer getreide und feinsaemereien

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR IT NL SE

17P Request for examination filed

Effective date: 19810107

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH DE FR IT NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19821020

Ref country code: BE

Effective date: 19821020

REF Corresponds to:

Ref document number: 2963911

Country of ref document: DE

Date of ref document: 19821125

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: BUEHLER AG

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 79105351.5

REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19961121

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19971113

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971223

EUG Se: european patent has lapsed

Ref document number: 79105351.5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19981110

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19981118

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990831

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19991221

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT