DD201875A5 - METHOD FOR CONTROLLING ELECTRICALLY ACTUATABLE FLUID VALVES OF FUEL ELEMENTS IN FUEL MACHINES AND ARRANGEMENT FOR CARRYING OUT SAID METHOD - Google Patents

Abstract

The method for controlling filling elements in filling machines for filling liquids in Fuellgefaesse, each filling element having an electrically operable Fluentigkeitsventil and means outside the Fuellgefaessen determine their filling levels, characterized in that detects the Stroemungsbeginn the liquid at each filling element after opening the liquid valve and the closing time the liquid valve is determined by a control operation in dependence on the amount of liquid to be filled into the filling vessel. The arrangement for carrying out the method is characterized in that a Recin computing system is provided for all Fuellelemente the filling machine, which has an input and output device and members for each controller for a controller that a common setpoint input system is provided for all controllers, for each filling element has an input and output mechanism and members for a controller that a common setpoint adjuster is provided for all controllers and each filling element below the fluid valve in Fuellelementauslauf has a connected to the input and output transducer for detecting the flow start of the liquid.

Description

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Method for controlling sensing elements having electrically operable liquid valves in filling machines and arrangement for carrying out the method

Application Field of the f indung

The invention relates to a method for controlling filling elements in filling machines and to an arrangement for carrying out the method «

Characteristic of the known technical solutions

In filling elements with an electrically actuated liquid valve, it is known to use as a means for determining the filling levels in the filling vessels with lower-section gas lines or in contact with the liquid reaching electrical signal generator and introduce the filling process into the filling vessels and then lead out again , Common here is that depending on the desired level, the line cuts or signal generator must be placed higher or lower and this requires a replacement or height adjustment of the gas line or signal generator, so that the rising in the filling liquid with filling elements with gas line upon reaching the gate, with filling elements Signaling device interrupts the further liquid feed during or after liquid contact on the signal generator «

To reduce the necessary for the replacement or height adjustment construction effort and the adjustment is already passed to provide fill level determining means for several filling elements outside the filling vessels and arrange interchangeable »

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Thus, by US-PS 2,949,941 a filling machine with a common control for several filling elements by means of a control device is known, which turns on the provided with electrically actuated liquid valves filling elements turns on a larger preselected section at each revolution of the filling machine and then turn off again. Within the quarterly opening period, the. is fixed by a height adjustable on the filler circumference and interchangeable arranged current-carrying rail for the sliding thereon contact arms of the liquid valves in the open position actuating magnet, the liquid flows up to the predetermined length of the rail length in the vessel, whereupon after interrupting the contact with the rail the liquid valves are closed by fluid pressure. In this control for filling elements, which have no in the filling and retractable filling height-determining agent for each filling element, different filling levels in the filling vessels are not excluded at variable speed of the filling machine »Thus, inaccuracies due to overfilling both at Sin- and Abschal- tung arise the filling machine in the start-up and shut-down phase after or before machine downtime as well as machine downtime. Also arise Füllhöhendifferenzen by the not taken into account by the known control copy dispersion in filling and filling element.

Object of the invention

The object of the present invention is by means of a method for controlling the generic assumed filling elements of a filling machine and by a. Order to implement the procedure for advance payments

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Th Pilling elements to improve the Plillgenauigkeit so and to increase that.the .Füllhöhe adversely affecting copy scatters are avoided.

Presenting the essence of the invention -

The object of the invention is to provide a method _J and an arrangement in which variable rotational speeds of the machine are disregarded and quantities in the blood vessels can be achieved that are within the specified tolerances by law.

According to the invention this object is achieved by a method, which is characterized in that for each filling element after opening the liquid valve, the start of flow of the liquid detected and the closing time of the liquid valve is determined in dependence on the liquid to be filled in the filling liquid by a -Regelvorgang. In a further refinement of the method according to the invention, which ensures the highest filling accuracy at the lowest possible cost of circuitry while ensuring gentle handling of the filling material, a separate control process is carried out for each filling element, the control processes of all filling elements being the common setpoint value In each case, a liquid quantity separated from the common nominal value is processed by a common computer for each individual control process. According to the invention, it is possible to process an actual value continuously oriented at the flow rate of the liquid .out. the measured values of the filling level or the weight of several, each filled on one and the same filling element

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The average value formed as a result of the purging vessels is the sum-actual value.

The common target value is appropriately corrected when the temperature and / or the specific weight of the liquid and / or the weight of the filling vessel changes.

It may be advantageous here that average values formed from the measured values of the filling level or the weight of a plurality of filling vessels filled on one and the same filling element are used as correction values for the actual value continuously oriented at the flow velocity of the liquid.

It is expedient that the start of flow and the continuous actual value of the flow rate of the liquid below the liquid valve be detected in the outlet of each individual Füllelement3 and that the measured values of the filling height or weight to form the average values at or after exit of the filled filling vessels from the filling machine to be recorded »

Advantageously, the respective mean value is corrected when the temperature and / or the specific weight of the liquid and / or the weight of the filling vessel changes.

A. Arrangement for carrying out the procedure according to the invention is characterized in that for all filling elements of the filling machine, a computing system is provided which has an input and output mechanism and members for a controller for each filling element, that a common Sollunkteller is provided for all controllers and each filling element -Inside the liquid valve in the filling element outlet, one connected to the input and output device

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having Hemswertaufnehmer for detecting the start of flow of the liquid has.

The respective transducer can be designed to detect the start of flow of the liquid, as a light barrier for detecting the start of flow and the Strömungsgeschv / indigkeit the liquid or for the heat tone measurement.

The computing system suitably has a common for all Püllelemente input and output unit ^ to which a Füllhöhenkontrollgerät or a balance suitable for continuous weighing is connected _? and the input and output unit is advantageously designed in such a way that it supplies the measured values recorded by the level control device or the balance to the computing system for processing by the bottles filled under one and the same filling element.

It is advantageous that the Füllhöhenkontrollgerät has a .Measurable to the level to be controlled Meß- .. barrier, for the measurement with gamma radiation has. But it can also have a measuring barrier in the manner of a light barrier which can be set to the level to be checked.

Ausführungsbeis ^ ^ iel

On the basis of an exemplary embodiment of the counter-pressure filling in bottles with counter-pressure filling element shown in the drawing .... the idea underlying the invention will be explained in more detail below. Show '.

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Pig. 1: the counter-pressure filling element with electrically actuated liquid valve axially cut in clamping division.

Pig. 2: the counter-pressure filling element with block diagram for controlling a plurality of filling elements acc. 1 and arrangement for checking the bottle filling height «

In the embodiment, it is a filling element 10 for a rotating counter-pressure Flaschenfüllmaschine.in single-chamber design. Several of the filling elements 10 are, as shown in Pig »1, attached to one of the filling machine associated annular Flüssigkeitskaromer 11». The liquid chamber 11 carries on the underside a clamping ring channel 12 and a Sntüufungsringkanal 13 with constantly open, leading to the outside outlets 14 * Each filling element 10 has an element body 15 with a valve housing 16 and a clamping gas chamber housing 17. In the interior of the valve housing 16, a vertical valve body under the action of a normally-closed spring 18 forms a valve 19 mounted on the valve seat. The valve body of the fluid valve 19 is actuated by means of a vertical plunger 20 and an electromagnetic actuator 21 operates on. Actively switched, it pushes the valve body against the Öffnerfeder.18. the valve seat in the closed position of the liquid valve 19 ·

From below, is inserted into the valve housing 16-.ein with a, Füllrohrkopf 23 provided .Füllrohr 22. It extends through the clamping gas chamber housing 17 "wherein the upper end of the tube, while maintaining a compensation chamber 24 forming intermediate distance to the lower end of the

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Liquid valve 19 and in die'ser position by a pin inserted in the housing 17 25 which engages under the shoulder of the Füllrohrkopfes 23, fixed »With 26 is provided with an inserted rubber centering tulip, the not shown on vertical guide rods up and down movable is and the downpipe 22 surrounds. In the area of the pin 25, the clamping gas chamber housing 17 has an annular clamping gas chamber 27 surrounding the filling tube 22. A clamping gas valve arrangement 28 is mounted laterally on the valve housing 16, in whose housing a valve disk 29 is rotatably arranged by means of a carrier 30. At the free, protruding from the housing end of the carrier 30 has an actuating lever 31 which cooperates with the frame of the filling machine and in different planes mounted control cams or control cams 32 in machine circulation and the valve disc 29 pivots in a respective required operating position ♦ One - Feather. 33 presses the valve disc 29 gas-tight against a base plate 34, in which the valve disc 29 facing surface coming from Spanngasringkanal T2, through the lower leg of the liquid chamber 11 and through .das valve housing 16 guided clamping gas supply channel 35 opens. Further, at the valve disc 28 facing surface of the base plate 34 open into the compensation chamber 24 leading equalization channel 36 and a clamping gas chamber 27 leading span gas inlet channel 37 which is connected tangentially to the clamping gas chamber 27.

The valve disc 28 has inside a radial Ka- nal 38 with two holes directed towards the base plate 34 and 40, which are dimensioned according to the mouths of the clamping gas supply channel 35, the compensation channel 36 and the Spanngss-Binleitkanals 37 and face each other with such a pitch, that they are in an effective

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Switching position connect at least two channel mouths via the channel 38 with each other.

The valve housing 16 also has a ventilation channel 41 leading to the vent ring channel 13, to which the clamping gas chamber 27 is connected via a discharge channel 42 projecting from the lower part of the clamping gas chamber 27 in the clamping gas chamber housing 17. The discharge channel 42 is connected via a nozzle 43 in constantly open connection with the venting channel 41st

Inserted laterally into the valve housing 16 and sealed off from the outside is a measuring transducer 46 which detects the start of flow and the flow velocity when the liquid valve 19 is opened after the liquid valve 19 has been opened. For this purpose, a known for .Wärmetönungsmessung transducer is suitable, which is located well below _{a of} the outlet of the liquid valve 19 in the intermediate distance of the liquid valve 19 and the upper Füllrohrende and projects into the compensation chamber 24. Connected, as shown in Fig. 2, the transducer 46 and the Elektromagnet.der actuator 21 for the liquid valve 19 to an input and output device 47 of a digital computing system 48, except the input and. Output mechanism 47 and a regulator for the filling element 10 forming members also the input and output device 47 and the regulator forming members for each additional existing filling element and a common for all filling elements computing and tail unit 49 and a central memory 50 which in direct mutual connection. Connected to the computing and tail unit 49 is a common for all controllers of the filling elements 10 input 51 as setpoint adjuster for the volume setpoints of

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bottles to be filled In connection with the control and tail unit 49, there is also an input and output unit 52, to which the control device 53 of a level control device 54 is connected, which measures the filling heights of the filled bottles at or after leaving the filling machine. The measured values determined are used for forming a correction value for deactivating disturbance variables during the sailing process and are input to the computing system 48 for processing separately from the input and output unit_.52 after the filling element. The filling height control device 54 expediently has a height-adjustable, from transmitter 55 and 5o receiver existing horizontal measuring barrier 57? which works with light or gamma radiation and at the level of the liquid level of the filled bottles at the output of the filling machine or shortly behind it is arranged on a single-lane, the division-appropriate Flaschenabtransport ensuring conveyor line.

It can be connected to the line connection of the actuating device 21 of the liquid valve 19 to the input and output 47 by means of a switching contact 58 is a closer to the Füllelement- 10 associated proximity switch 59 «He is fixedly disposed in that area of the actuating lever 31 and the carrier 30, in which the valve disc 29th which is used to bias the bottle to be filled with gas and is effectively affected by the operating lever 31 in this cocking position. Instead of the proximity switch 59 for each filling element, a central control for. all filling elements, for example in the form of a slide register arrangement, are provided «

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To carry out the procedure according to the invention with the ready-to-fill element 10 is input from the input of the volume setpoint of the bottles to be filled a piata in the computing and tail 49 and stored in the central memory 50.

If an empty bottle to be filled is then placed on a lifting device 60 associated with the filling element 10 and pressed against the filling element 10 by raising the centering tulip 26, centering the bottle mouth on the pressing rubber and inserting the filling tube 22 into the bottle, the gas bias takes place For this purpose, the valve disc 29 has been pivoted by means of acting on the actuating lever 31 control cam 32 from the rest position into the clamping position. In this position, the bore 40 of the channel 38 with the clamping gas supply channel 35 and the bore 39 of the channel 38 with the clamping gas inlet channel: 37 is connected and the clamping gas flows from the clamping gas supply channel 35 in the clamping gas inlet channel 37 and from there via the Clamping gas chamber 27 into the interior of the bottle to be filled, whereby the desired clamping gas pressure is produced. Due to the tangential inflow of the clamping gas into the clamping gas chamber 27 existing liquid residues are removed at the same time on the chamber walls and in the region on the filling tube 22 and reach via the discharge channel 42, the nozzle 43 »the channel 41 in the vent passage 13. In this clamping position with the atmosphere towards open Gasablaßweg a surface of the actuating lever is the proximity switch 59 effectively opposite, so that the switching contact 58 and thus the circuit for the magnet of the actuator 21 is closed. As a result, the actuator 21 is activated ^ and the

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Valve body of the closed fluid valve 19 is fixed to its valve seat and secured in the closed position * "

Upon further rotation of the filling element 10 after completion of the bias voltage is at start of the operating lever 31 at another attached to the filling machine frame control

, cam 32, the valve disc 29 is pivoted back into the rest position, whereby the clamping gas supply is interrupted. By the same time from the operative position with the proximity switch 59 v / eggeschwenkten operating lever opens the switch contact 58, so that the circuit of Ma -

gneten the actuator 21 is interrupted and the excitation of the magnet is released. The opening spring 18 then moves the released by the magnet valve body of the liquid valve 19 upwards, so that the liquid via the compensation chamber 24 and the filling tube 22 enters the bottle »About the discharge channel 42, the nozzle 43 and the venting channel 41 flows from the incoming liquid displaced gas into the vent ring channel 13 and from there via the outlets 14 to the outside. As soon as the liquid flows out of the opened liquid valve 19, it covers the part of the measuring sensor 46 projecting into the compensation chamber 24, which detects the start of flow when it is covered. The measured value indicating the beginning of the flow passes via the input and output device 47 into the computing system 48. the control process for determining the closing time es -für the liquid valve 19 initiates »The required for the control process actual value, which refers to the flow velocity of the liquid is continuously detected from flow beginning also by the Meßwertaufnehmer 46 and arrives for processing on the input and output device 47 into the computing system 48. This

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calculates the closing time for the Plüssigkeitsventil and at this time via the input and output device 47, a closing signal to the magnet of the actuator 21 of the liquid valve 19 »whereupon the magnet is energized and the Plüssigkeitsventil 19 assumes the closed position. With the output of the closing signal of R _e gelvorgang is completed »With continued circulation of Püllelements 10 and restart the operating lever 31 on a further control cam 32, the valve disc 29 is then pivoted into a balancing position in which the bore 39 of the channel 38 with the mouth of the Spanngaseinieitkanals 37 and the bore 40 is connected to the mouth of the compensation channel 36 in conjunction * The flow connection for the gas from the space above the Püllrohres 22 to the clamping gas chamber 27 has the result that the levels of the liquid in Füllrohrinnern and in the bottle each other At the same time, the overpressure which is still present in the gas space of the bottle and in the system parts communicating with the bottle gas space via the channels 36 and 37 is dissipated via the discharge channel 42, the nozzle 43, the deaeration channel 41 and the deaeration ring channel 13. After a successful dismantling is done by a at A Output of the closing signal effectively switched, provided in the input and output device 47 timer cleared the closing signal, whereby the magnet of the actuator 21 is de-energized and the liquid valve 19 is kept closed by the fluid pressure. With further circulation of the filling element 10, the filled bottle is removed by lowering the filling element 10. The valve disc 29 in turn can be swung back by a restart of the operating lever 31 on a control element 32 of the machine frame in the rest position or in the

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prescribed compensation position remain until the filling element 10 is supplied for the subsequent filling a new bottle and pressed for the bias.

During or after the discharge of the respectively filled bottle from the filling machine, the respective contents of the bottles are controlled by the measuring barrier 57 des.-Füllhöhenkontrollgerätes 54 set to the quantity to be controlled in the height by each bottle passes the measuring barrier 57. This preferably works with a gamma radiation which is directed from the measuring source formed as a transmitter 55, which contains a gamma emitter with a very low radiation dose rate, to the receiver 56. The latter receives less radiation if, in addition to the bottle wall, the contents of the bottle are also to be penetrated and evaluates the incident radiation For each bottle filled under one and the same filling element, these are supplied separately to the computing system 48 via its binding and output device 52. From a plurality of, for example three individual measurements per filling element, averages are formed which are correct are taken into account in the control process of the corresponding filling element 10, which caused by disturbances Füllmengen inequalities are turned off. If, for example, the temperature and / or the specific weight of the liquid changes during filling, these changes are not taken into account by the respective average values as correction values; so the mean values or correction values are to be corrected according to these changes, for example by changing the setting of the degree of absorption.

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If there is no need to correct the control process due to not affecting the accuracy of the filling amount disturbing variables in the filling element 10 with suitable for detecting the actual value 46, the -Pull height control of the filled bottles by the Füllhöhenkontrollgerät 54 can be omitted and the filling process without the Control device 54 are carried out in the manner described above »In this case, however, to correct the temperature or change the specific gravity of the liquid, the common setpoint by hand or by measured variables»

Another embodiment of the invention is that the transducer 46 is designed to detect the start of flow as a light barrier and the actual value of several average values, each of several, for example three, through the measuring barrier 57 of the level control device 54 of and consist of measured values filled with the same filling element 10, is formed as a sum-actual value in the computing system 48. In this case, the filling process takes place in the manner described above, "only with the difference that for the respective control process to form the actual values measured values are to be detected by the Füllhöhenkontrollgerät 54 and the first control operations until the presence of a first sum actual Value must be adjusted as a function of the nominal value, and the respective average value must also be corrected accordingly in the case of temperature and specific changes in the weight of the liquid. "

Of course, instead of the Füllhöhenkontrollgerätes 54 and an electronic checkweigher for continuous weighing of the filled bottles used and to the

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Input and output unit 52 of the computer system 48 are connected, wherein the average values from several weighings in the manner described above are used and processed to form a sum-actual value or a correction value and the respective mean value or correction value when the temperature changes. the specific weight and the weight of the filling vessel is corrected accordingly.

In the case of the above-described actuating device 21 for the liquid valve 19, the magnet is de-energized in the rest position of the filling element 10. For control engineering reasons · the structure of this actuator can of course also be such that the _magnet} in. Rest position is energized and energized. Also, the actuator instead of the magnet as a controllable actuator having an electrically controllable, pneumatically operating actuator »

It is understood that the solution shown by the invention for the liquid filling, while avoiding in the filling vessels on and herausführbarer .füllhöhenbestimmender means to reach accurate filling heights, not only suitable for the explained on .Execution back pressure, but also for the other filling systems and, accordingly, the invention also extends to these filling systems.

Claims (17)

2334 1. A method for controlling filling elements in filling machines for filling liquids in Filiigefäße, each filling element having an electrically operable liquid valve and means outside the filling vessels determine the filling heights, characterized in that detected at each filling element after opening the liquid valve, the flow start of the liquid and the closing time of the liquid valve is determined as a function of the amount of liquid to be filled into the filling vessel by a control process. 2. The method according to item 1, characterized in that ^ for each Fülielement a separate control process is carried out, for the control operations of all filling elements as a common target value to be filled in the filling vessels each liquid to be filled set and for each control process one of the common target Value separated actual value is processed by a common computer. 3 * Method according to points 1 and 2, characterized in that an actual value is continuously processed at the flow rate of the liquid. « 04/01/1982 59 617/17. is designed such that it feeds the measured values from the filling level control device (47) or the balance from the bottles filled under one and the same filling element to the computing system (48) for processing. 4.1 * 1982 59 617/17 the filling machine a computing system (48) is provided, which for each filling element (10) has an input and output device (47) and links for egg controller, that for all controllers a common setpoint adjuster (51) is provided and each filling element (10) Having below the liquid valve (19) in Füllelementenauslauf a to the input and output device (47) connected to the transducer (46) for detecting the start of flow of the liquid. 4.1.1982 59 617/17 4 · Method according to item 3, characterized in that the common target value is corrected when the temperature and / or the specific weight of the liquid and / or the weight of the filling vessel changes. « 4.1.1982 59 617/17 invention claim Method according to points 1 to 3, characterized in that average values formed from the measured values of the filling level or the weight of a plurality of filling containers filled on the same filling element are used as correlctural values for the actual value continuously oriented at the flow rate of the liquid. 6. Method according to points 1 and 2, characterized in that the mean value calculated from the measured values of the filling level or the weight of a plurality of filling vessels, each filled with one and the same filling element, is averaged. Method according to one or more of the items 1 to 5, characterized in that the start of flow and the continuous actual value of the flow velocity. the liquid can be detected below the liquid valve in the outlet of each individual filling element 8 »Method according to item 5 or 6, characterized in that the measured values of the filling level or the weight for forming the mean values are detected during or after discharge of the filled filling containers from the filling machine. 9. Method according to item 5 or 6, characterized in that the respective average value is corrected by changing the temperature and / or the specific weight of the liquid and / or the weight of the filling container. « 10. Arrangement for carrying out the method according to item 1, characterized by? that for all filling elements ^ 483 4 11. Arrangement according to item 10, characterized in that the .jeweilige transducer (46) is designed to detect the start of flow of the liquid, 12 · Arrangement according to point-11, characterized in that the transducer (46) 'is designed as a light barrier. , ' Arrangement according to item 10, characterized in that the respective transducer (46) for detecting the start of flow and the flow velocity of the. Liquid is formed » 14 · Arrangement according to item 13, characterized in that the transducer (46) is designed for the catalytic heat-fusion molding · Arrangement according to items 10 to 14, characterized in that the computing system (4S) has a common input and output unit (52) for all filling elements (10), to which a filling height control device (54) or a balance suitable for continuous weighing is connected and that the input and output unit (52) 16 »arrangement according to item 15 _}, characterized in that the filling height control device (47) has an adjustable on the level to be controlled measuring barrier (57) for the measurement with gamma radiation» 17 · Arrangement according to item 15 »characterized in that the filling height control device (47) has a measuring barrier (47), which can be adjusted to the level to be checked, in the manner of a light barrier« For this 2 pages drawings