DD245241A1

DD245241A1 - PUMP AND COOLING DEVICE FOR FLUIDS, PARTICULARLY MILK

Info

Publication number: DD245241A1
Application number: DD28529985A
Authority: DD
Inventors: Werner Bergmann; Harald Koenig; Juergen Spillecke
Original assignee: Fortschritt Veb K
Priority date: 1985-12-24
Filing date: 1985-12-24
Publication date: 1987-04-29

Abstract

Die Erfindung bezweckt bei Melkstaenden und Stallmelkanlagen die Einsparung einer Milchpumpe und eines Stapelbehaelters fuer die ermolkene Milch. Da die Milch diskontinuierlich anfaellt, wird durch Zweipunktregelung die Milch in ein weiteres Sammelgefaess gepumpt, aus welchem diese dann ueber den Waermeaustauscher gepumpt wird. Durch die Erfindung wird das staendige Ein- und Ausschalten der Milchpumpe vermieden und gleichzeitig eine Pumpe und ein Behaelter eingespart. Dies geschieht dadurch, dass der Milchbehaelter oder Milchschleuse wie bisher unter Unterdruck steht und dass dieser mit einem Sensor versehen ist, der ueber ein Steuergeraet fuellstandsabhaengig die Drehzahlregelung der Milch- und Kuehlwasserpumpe vornimmt, so dass es nur in Extremfaellen und zu Melkende zur Abschaltung der Pumpen kommt. FigurThe invention aims at milking stalls and Stallmelkanlagen the saving of a milk pump and a Stapelbehaelters for the milked milk. Since the milk is discontinuous, the milk is pumped through a two-point control into another collecting vessel, from which it is then pumped via the heat exchanger. The invention avoids the constant switching on and off of the milk pump and at the same time saves a pump and a container. This happens because the Milchbehaelter or milk lock as before is under negative pressure and that this is provided with a sensor that makes a Fuellstandsabhaengig the speed control of the milk and Kuehlwasserpumpe via a control unit, so that it only in extreme cases and at the end of milking for switching off the pump comes. figure

Description

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß der Milch- und Kühlwasserförderung ein gemeinsamer oder getrennter drehzahlgesteuerter Pumpenantrieb mit unterschiedlichen Fördermengen von Milch und Kühlwasser dient, die Kühlwasserpumpe abschaltbar, auskuppelbar oder der Förderstrom um den Wärmeaustauscher umleitbar ist und daß die Drehzahlregelung beider Pumpen in Abhängigkeit von der Füllstandshöhe im Milchbehälter durch bekannte Sensoren erfolgt.According to the invention, this object is achieved in that the milk and cooling water promotion a common or separate speed-controlled pump drive with different flow rates of milk and cooling water used, the cooling water pump can be switched off, disengaged or the flow is diverted around the heat exchanger and that the speed control of both pumps as a function of the level in the milk container is done by known sensors.

embodiment

Die Erfindung soll nachstehend an einem Ausführungsbeispiel und der dazugehörigen Zeichnung näher erläutert werden. Die in den Sammelbehälter oder die Milchschleuse 1 von der Melkanlagezufließende Milch wird durch den Drucksensor 3 gewichtsmäßig, oder durch Schwimmer mit elektrischer Gebereinrichtung, oder mit kapazitiven induktiven oder fotoelektrischen bzw. optoelektrischen Sensoren oder mittels Ultraschall nach dem Echolot-Prinzip höhenmäßig erfaßt und die vom Sensor 3 abgegebene füllstandsproportionale Spannungsänderung dem Steuergerät 4 zugeführt, welches die Drehzahlregelung entweder stufenlos oder stufenweise für den oder die Antriebsmotoren 5 vornimmt. Bei gemeinsamem Antrieb trägt die WeI Ie 6 eine ausgkuppel bare Kupplung 7, so daß beim Reinigen die Milchpumpe 8 mit voller Leistung gefahren werden kann, während die Kühlwasserpumpe 9 außer Betrieb gesetzt wird. Die Kühlwasserpumpe 9 kann allerdings weiterlaufen, wenn beim Umschalten der Anlage vom Melkbetrieb zum Reinigungsbetrieb der Wärmeaustauscher 10 durch Magnetventile und eine Bypaßleitung umgangen wird, so daß die Kühlwaserpumpe 9 für die Durchmischung des Kühlwassers im Eiswasser-Vorratsbehälter 11 sorgt. Die vom Sammelbehälter 1 und die vom Eiswasserbehälter 11 geförderten Flüssigkeiten tauschen während des Melkprozesses ihre Wärme im Wärmeaustauscher lOausundgelangennach erfolgtem Wärmeaustausch in den Milchlagertank 12 bzw. zurück in den Eiswasserbehälter 11. Anstelle der gemeinsamen Antriebswelle 6 könnte beispielsweise eine Antriebswelle mit zwei Keilriemenscheiben Anwendung finden, wobei neben unterschiedlicher Pumpengröße auch durch unterschiedliche Übersetzung der Pumpenantriebe die unterschiedliche Förderleistung beim Milch- und Eiswasserdurchfluß erreicht werden könnte. Hört der Milchfluß völlig auf und sinkt der Milchspiegel auf den Minimalwert, schaltet die Anlage völlig ab.The invention will be explained below with reference to an embodiment and the accompanying drawings. The milk to be fed into the sump or milk sump 1 from the milking plant is detected by the pressure sensor 3 in terms of weight, or by float with electrical transducer means, or by capacitive inductive or photoelectric or optoelectric sensors or by ultrasound according to the sonar principle and the sensor Supplied level-proportional voltage change supplied to the control unit 4, which makes the speed control either continuously or stepwise for the or the drive motors 5. With a common drive the WeI Ie 6 wears an uncoupled clutch 7, so that when cleaning the milk pump 8 can be driven at full power, while the cooling water pump 9 is disabled. However, the cooling water pump 9 can continue to run when the switching from the milking to the cleaning operation of the heat exchanger 10 is bypassed by solenoid valves and a bypass line, so that the cooling water pump 9 ensures the mixing of the cooling water in the ice water reservoir 11. During the milking process, the liquids conveyed from the collecting container 1 and from the ice water container 11 exchange their heat in the heat exchanger 10 and return to the ice water container 11 after the heat has been exchanged. Instead of the common drive shaft 6, for example, a drive shaft with two V-belt pulleys could be used In addition to different pump size and different translation of the pump drives, the different flow rate for milk and Eiswasserdurchfluß could be achieved. If the milk flow stops completely and the milk level drops to the minimum value, the system switches off completely.

Claims

Invention claim:

1. Pumping and cooling device for liquids, in particular discontinuously accumulating fresh milk in the extraction in milking parlors or Stallmelkanlagen in which the fresh milk and the cooling medium via a heat exchanger (10) pumped, the milk is cooled to storage temperature and stored in a storage tank (12) , characterized in that for continuous and proportional delivery of milk and cooling liquid, a common or separate speed-controlled pump drive (5) is used, the speed control device is coupled to a in or on Milchsammeigefäß (1) arranged level detection sensor (3) and that in the cleaning process of the cooling water pump drive (7) can be switched off or disengaged.

For this 1 page drawing

Field of application of the invention

The invention relates to a pumping and cooling device for liquids, especially in milking parlors or Stallmelkanlagen obtained fresh milk. , ·

Characteristic of the known technical solutions

Freshly milked milk must be cooled as quickly as possible to the storage temperature of 4 ° C in order to maintain its quality. The cooling can be done in one or two stages, and the released heat energy can be used. It is known to pre-cool with tap water to consume this in the stable, or it is supplied to the condenser of the refrigeration system further heat the use of water. It is also known to design the flow cooling to low power and during the milking process the milk to cool down to about 20 ° C in order to cool them after milking in the circulation process until the storage temperature of 4 ° C is reached. The advantage is that the cooling system can be kept smaller and system costs are saved. The disadvantage is that the milk quality suffers due to the repeated circulation because fat globules form through the centrifugal pump and in the line system and the milk is too strongly enriched with air, so that foaming can occur. Energy is not saved. On the contrary, the milk heats up slightly due to the pump energy and through the loop leading through the milk room. The flow cooling is preferred over the storage cooling because the milk is cooled down quickly and does not have to be constantly stirred, as in a milk cooling pan, and continual stirring can also lead to a reduction in the quality of the milk. Since the milk fall in the milking plant fluctuates, a large collecting container or a smaller collecting container and an intermediate container is needed as a buffer. By means of electrode or float control, the milk is pumped from the collecting container into the intermediate container in order to continuously suck the milk from the intermediate container at a constant delivery flow and to pass it via the heat exchanger. Such a system describes z. For example, CS patent 162 981. For this purpose, one generally uses ice water whose temperature is just above the freezing point. In order to have enough ice water available for rapid milk cooling, the ice water is generated during the milking breaks by means of the refrigeration system and stored in the isolated storage. In order to reduce the volume of the coolant, it is known to produce by a water-alcohol mixture below 0 ⁰ C lying coolant, which has a greater heat absorption capacity. During milking is then usually funded by a pump milk and by the other pump ice water through the heat exchanger, the pumps have different flow rates and usually have separate drives. It must always flow a much larger amount of ice water than milk through the flow cooler, since the ice water may only have a slight increase in temperature to remain below the storage temperature of the milk of 4 ⁰ C. If you were to promote intermittently by electrode or float control from the reservoir, the intermediate container could be saved. The frequent switching off and on of the pump is detrimental to the milk and the life of the pump.

It is also known to pump a certain amount of milk into the cooler; To cool these there and then displace by the same amount of fresh milk in the storage container. This cooling method also has the disadvantage of frequent startup of the breastpump. The cooling water pump can continue to run.

Object of the invention

The object of the invention is the saving of construction costs and space.

Explanation of the essence of the invention

The technical task is to allow a milk cooling adapted to the milk case without intermediate container and to achieve a constant milk temperature at the cooler outlet.