EP0242786B1 - Device for measuring a fluid product - Google Patents
Device for measuring a fluid product Download PDFInfo
- Publication number
- EP0242786B1 EP0242786B1 EP87105596A EP87105596A EP0242786B1 EP 0242786 B1 EP0242786 B1 EP 0242786B1 EP 87105596 A EP87105596 A EP 87105596A EP 87105596 A EP87105596 A EP 87105596A EP 0242786 B1 EP0242786 B1 EP 0242786B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting sleeve
- rotary valve
- rotary
- drive
- valve member
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
- B65B3/30—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement
- B65B3/32—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement by pistons co-operating with measuring chambers
Definitions
- the invention relates to a device for dimensioning a flowable product, which is filled from a storage container into a packaging unit, with a rotatably mounted in a housing and designed as a measuring slide, which encloses an opening provided with an opening, the one when filling the cavity Product-containing storage container faces, while it faces the packaging unit during the emptying of the cavity after a rotation of the rotary valve, and a piston for filling and emptying the cavity, the drive of which is arranged on the same side of the housing as the drive of the rotary valve.
- the piston rod must therefore not have a circular cross-section, since with such a configuration it could be pivoted within its mounting relative to the rotary slide valve, which for this reason the execution of swivel movements would not be taken.
- the thought was given to equipping the piston rod with an angular cross section, for example a rectangular or preferably square cross section.
- a configuration in any other way is also conceivable, which guarantees that the rotary valve is carried along when pivoting the piston rod.
- the object of the invention on which this patent application is based is therefore to improve the device of the type mentioned in the introduction so that it has a relatively high wear resistance.
- the rotary valve and the piston have separate drives and that the rotary valve is connected at its end facing the drive with a connecting sleeve at a point which is in the vicinity of the cylindrical jacket of the connecting sleeve with respect to the central axis is located, and that a rotary actuator pivoting about its longitudinal axis is coupled to the connecting sleeve.
- the function of the piston rod is now limited to the function of conventional piston rods, which has transmitted the forces for the longitudinal movements of the piston.
- the piston rod is not used to transmit the forces that pivot the rotary valve. This means that when the piston rod is designed, there is no need for a design that is suitable for driving the rotary valve when pivoting movements are carried out.
- the piston rod can have any cross section, including a circular one. This makes the manufacture of this piston rod considerably cheaper than that with an angular cross section and the wear is negligible.
- the rotary slide valve is driven with the aid of the connecting sleeve, which is connected on its outer circumference to the rotary slide valve and is coupled to the rotary drive.
- This ensures that the pivoting forces on the outer circumference of both the connecting sleeve and the rotary valve are transmitted.
- Such an arrangement has the advantage that the torque required for pivoting the rotary valve is introduced into the rotary valve at a convenient point. Since the forces are transmitted on the outer circumference of the connecting sleeve, it can be designed with a relatively small wall thickness, so that it is light and cheap.
- the rotary drive can be attached to the surface of the connecting sleeve very easily and in a structurally simple manner.
- the connecting sleeve can be connected to the rotary valve in a simple manner, namely with the aid of screw connections, so that easy assembly and disassembly is possible without the piston or the piston rod having to be removed.
- a device consists essentially of a housing (1), a rotary valve (2) and a piston head (3).
- the rotary valve (2) is guided with a tight fit 4 in an interior (5) which is formed within the housing (1).
- the rotary valve (2) is both rotatable about its longitudinal axis and slidable in the axial direction. Storage takes place on an outer surface (6) of the rotary valve (2) facing the housing (1), which slidably acts on an inner surface (7) of the housing (1) opposite it, which delimits the interior (5).
- the rotary valve (2) is designed as a measuring container, in the interior of which a cavity (8) is provided.
- This cavity (8) extends in the axial direction of the rotary valve (2) and is approximately cylindrical.
- the piston head (3) slides in the axial direction, to which a piston rod (9) is attached, which protrudes with its end (10) opposite the piston head (3) from the rotary valve (2).
- This is closed at its end (10) of the piston rod (9) adjacent end (12) by a wall (11) which is penetrated by an opening (13).
- the piston rod (9) is guided in this opening (13).
- This has a round or square cross section, so that the opening (13) also has a corresponding cross section.
- a coupling device (15) is provided at the end (10) of the piston rod (9), to which a drive (not shown) which moves the piston rod (9) can be coupled.
- This coupling device (15) is designed as a bore which penetrates the piston rod (9) transversely to the longitudinal direction thereof.
- annular groove (16) is embedded in the wall (11), the mutually opposite walls of which extend in the radial direction are designed as sliding surfaces (17, 18).
- a coupling (19) slides on these sliding surfaces (17, 18), which is connected to a drive, not shown, which is capable of displacing the rotary valve (2) in the axial direction.
- the end of the rotary slide (2) protrudes (12) from a rear part (20) of the housing (1).
- the groove (16) is provided on this end (12) protruding from the housing (1).
- the outer surface (6) tapers towards its opposite front end (21) in such a way that the cross sections taper from the rear end (12) towards the front end (21).
- the inner surface (7) of the interior (5) is conical, so that it has its largest cross section in the area of its rear part (20).
- the cavity (8) is designed as a cleaning chamber (22) at its end adjacent to the wall (11). This has a larger cross section than a front part (21) facing cylinder part (23), the cross section of which is dimensioned such that the piston head (3) sliding in it is guided with such a close fit that it is capable of depending to generate a negative or positive pressure within the cylinder part (23) according to the direction of movement.
- the piston head (3) carries at its end adjacent to the piston rod (9) a piston sleeve (24), which with its outer surface (25) ensures a pressure-tight seal of the piston head (3) within the cavity (8).
- a transition zone (26) is provided between the cleaning chamber (22) and the cylinder part (23), in which the cross section of the cylinder part (23) continually widens to the cross section of the cleaning chamber (22).
- Access openings (27) for a cleaning liquid are provided in the cleaning chamber (22) and are supplied via a cleaning connection (28).
- This cleaning connection (28) extends through the housing (1) into the interior (5).
- a further cleaning connection (33) is provided on a front end (34) of the housing (1) which is adjacent to the front end (21). This cleaning connection (33) is aligned with an access opening (35) which opens into the interior (5) in the region of the front end (21).
- a further cleaning connection (36) is provided in the area of an inlet (37) through which a product to be filled is passed through a bore (38) into the housing (1) and from there via an opening (39) into the cylinder part (23). of the cavity (8) occurs.
- the inlet (37) can be designed as a pipeline which is fixedly connected to a correspondingly designed flange which surrounds the bore (38) and is fixedly connected to the housing (1).
- the housing (1) is provided at its front end (34) with a bore (41), the cross section of which is smaller than that of the interior (5) adjacent to it.
- This bore (41) is closed by a cap (42) which is guided with a collar in the bore (41).
- a bearing journal (44) adjoins this collar in the direction of the interior (5), the cross section of which corresponds to the cross section of the cylinder part (23) into which the bearing journal (44) projects.
- the rotary slide valve (2) is guided in the region of its front end (21) on this bearing journal (44).
- This cap (42) is delimited on its outside facing away from the bearing journal (44) by a cover surface which projects beyond the collar and closes the bore (41) in a pressure-tight manner.
- the interior (5) has an outlet bore (46) which is opposite the bore (38) by an angle of rotation of approximately 180 ° with respect to the housing (1).
- This outlet bore (46) is aligned with the opening (39) of the rotary valve (2) and thus with the bore (38). It opens into a mouthpiece (47), for example, immediately above a packaging unit to be filled a cup (48) is arranged.
- This cup (48) is transported with the aid of a conveyor device (49), for example a conveyor belt, in the direction of the mouthpiece (47) or is conveyed away therefrom.
- connection sleeve (70) is firmly connected to the wall (11) by means of screws (71) which protrude through a flange (72) facing the wall (11) into screw holes (73) provided in the wall (11) . With the aid of the screws (71), the flange (72) facing the wall (11) is firmly screwed.
- the connecting sleeve (70) extends in a direction facing away from the front end (21) and is designed as a piece of pipe to which a rotary drive (75) for the rotary slide valve (2) is connected.
- This rotary drive (75) can be designed, for example, as a pinion (76) which is fastened, for example shrunk, onto a surface (74) of the tubular connecting sleeve (70).
- This pinion (76) has a relatively large width which is larger than that of a drive gear (77) which is in engagement with the pinion (76).
- This drive gear (77) is fastened to a drive shaft (78) which is driven by an electric motor (79).
- the comparatively large width of the pinion (76) compared to the drive gear (77) allows the connecting sleeve (70) to be displaced in its longitudinal direction without the drive gear (77) therefore becoming disengaged from the pinion (76).
- the connecting sleeve (70) has a relatively large inner diameter (80).
- One of a wall corresponds to it (81) of the connecting sleeve (70) spanned interior (82) into which the piston rod (9) protrudes with its end (10).
- a drive (not shown) which moves the piston rod can be brought into engagement with the coupling device (15) inside the interior (82).
- the connector sleeve (70) is enclosed on its surface (74) by the coupling (19) with little play. With the help of this coupling (19), both the rotary valve (2) and the connecting sleeve (70) connected to it can be moved in their longitudinal directions.
- the product to be filled for example a milk product interspersed with solid components
- the inlet (37) in the direction of the bore (38) and the opening (39), which during the filling of the cylinder part (23) with the Hole (38) is aligned.
- the product is sucked in that the piston head (3) is moved in the direction of the cleaning chamber (22) and a negative pressure is generated in the cylinder part (23). The movement of the piston head comes to an end before it reaches the cleaning chamber (22).
- the electric motor (79) which can be a stepping motor, is switched on, which via the drive gear (77) and the pinion (66) connects the connecting sleeve (70) and thus the rotary valve (2) through an angle of 180 ° twisted.
- the opening (39) reaches the area of the outlet bore (46).
- the piston head (3) is moved towards the front end (21) and the product contained in the cylinder part (23) through the outlet bore (46) towards the Ejected cup (48).
- the rotary slide valve (2) is rotated about its central axis until the opening (39) is aligned with the bore (38). In this position, the product can enter the opening (39).
- the piston head (3) is moved in the direction of the cleaning chamber (22), so that a vacuum is now created in a part of the cylinder part (23) which is adjacent to the front end (21) and which pushes the product into the cylinder part (23 ) sucks.
- the rotary valve (2) is pulled out of the snug fit (4) in the direction of its rear end (12) with the aid of the coupling (19).
- a relatively small displacement of the rotary valve (2) is sufficient.
- the drive gear (77) slides by the size of this displacement through the teeth of the pinion (76) which are in engagement with it.
- This offset is sufficient to loosen the seat of the rotary valve (2) within the interior (5) to such an extent that, due to the conical shape of both the inner surface (7) and the outer surface (6), that a through the cleaning connections (28 ) and (33) entering cleaning liquid between the outer surface (6) on the one hand and the inner surface (7) on the other.
- the cleaning liquid passes through the cleaning connection (33) into the region of the front end (21) of the rotary slide valve (2), so that it is also cleaned to the desired extent.
- the cleaning liquid enters through the cleaning connection (33) both via the collar (44) into the cavity (8) and via the outer surface (6) into the opening (39).
- cleaning liquid gets through the cleaning connection (36) into the Inlet (37) and thus into the cavity (8).
- the piston head (3) is pulled back into the cleaning chamber (22), so that it is washed around on all sides by the cleaning liquid that enters through the access opening (27).
- the cross section of the cleaning chamber (22) is selected so that the piston head (3) does not rest on its inner walls when it is drawn into it.
- the piston head (3) is flushed on all sides with cleaning agent, which leaves the cleaning chamber (22) via an outlet opening (50) which is provided in the rotary valve (2) and is aligned with a drain opening (51) which is in the housing (1 ) is provided and emerges from the cleaning liquid in the direction of a collecting container, not shown.
- the cleaning process is ended.
- the supply of cleaning fluid to the cleaning connections (28, 33, 36) is interrupted and the rotary valve (2) is moved in the axial direction onto the front end (21) by means of the coupling (19), so that the tight fit ( 4) is restored.
- the filling of the cups (48) can be resumed, which are transported up to the conveyor (49).
- the connecting sleeve (70) it is also possible, via the connecting sleeve (70), to introduce the forces necessary for displacing the rotary slide valve (2) directly into the latter.
- the coupling (19) can be omitted.
- the connecting sleeve (70) is connected directly to the rotary valve (2) via an intermediate piece (83) by means of the screws (71).
- the spacer (83) only serves to receive a sliding bush (84) in which the opening (13) is provided for mounting the piston rod (9).
- a drive (85) for displacing the rotary valve (2) in its longitudinal direction is attached to the surface (74) in addition to the rotary drive (75), which is not shown in FIG. 2.
- This displacement drive (85) consists essentially of a ring (86) which is fixed immovably on the surface (74) in the longitudinal direction of the connecting sleeve (70), for example shrunk on.
- This ring (86) is rotatably mounted with respect to a driver (87) which can only perform movements in the longitudinal direction of the connecting sleeve (70), but not rotary movements.
- the rotatable mounting of the driver (87) relative to the ring (86) can take place, for example, with the aid of a deep groove ball bearing (88) which transmits the forces required to move the rotary valve (2) from the driver (87) to the ring (86).
- a deep groove ball bearing (88) which transmits the forces required to move the rotary valve (2) from the driver (87) to the ring (86).
- a slide bearing between the driver (87) and the ring (86) instead of a deep groove ball bearing (88).
- the driver can, for example, be designed as a sliding sleeve (89) extending in the longitudinal direction of the connecting sleeve parallel to its surface (74), which is provided at its end facing the ring (86) with a groove (90) receiving the ring (86) , in which the ring (86) is rotatably mounted.
- a rack (91) extending in the longitudinal direction of the connecting sleeve (70), for example, can be fastened to the sliding sleeve (89) and a toothed pinion (92) driven by a drive motor (not shown) engages in the teeth thereof.
- the pinion (92) moved in one direction or the other. It takes the rack (91) and thus the ring (86) with it, via which the rotary slide (2) is either pulled into the cleaning position or pushed out of this back into the filling position.
- the intermediate piece (83) is also possible to connect the intermediate piece (83) directly to the connecting sleeve (70) so that it is connected directly to the rotary slide valve (2) via the screws (71).
- the connecting sleeve (70) is provided at its end facing the rotary valve (2) with a flange (93) through which the screws (71) protrude into the rotary valve (2).
- This flange (93) bears directly on a radially extending support surface (94) provided on the rotary slide valve (2).
- the flange (93) serves to receive the slide bush (84) in which the piston rod (9) is mounted.
- connection of the connecting sleeve (70) to the rotary valve (2) is aimed at a short, compact construction which allows the rotary actuator (75) as well as the sliding actuator (85) to be arranged at a point as close as possible to the rotary valve ( 2) lies.
- the connection of the connecting sleeve (70) to the rotary valve (2) is selected so that the torques necessary for rotating the rotary valve (2) are introduced into the rotary valve (2) at one point, as far as possible on the outer circumference of the rotary valve (2).
- the piston rod (9) can have any cross section, for example a circular or angular cross section.
- the choice of a circular cross section is advisable since it allows a cheap and simple design of the slide bush (84).
- Warehousing of the rotary valve (2) is carried out on a bearing bush (52) both for the purpose of executing rotary movements and of axial movements.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
- Detergent Compositions (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Polyesters Or Polycarbonates (AREA)
- Sampling And Sample Adjustment (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Abmessung eines fließfähigen Produktes, das von einem Vorratsbehälter in eine Verpackungseinheit eingefüllt wird, mit einem in einem Gehäuse drehbar gelagerten und als Meßbehälter ausgebildeten Drehschieber, der einen mit einer Öffnung versehenen Hohlraum umschließt, die beim Befüllen des Hohlraumes einem das Produkt enthaltenden Vorratsbehälter zugewandt ist, während sie bei der Entleerung des Hohlraumes nach einer Verdrehung des Drehschiebers der Verpackungseinheit zugewandt ist, und einem Kolben zur Befüllung und Entleerung des Hohlraumes, dessen Antrieb auf derselben Seite des Gehäuses angeordnet ist wie der Antrieb des Drehschiebers.The invention relates to a device for dimensioning a flowable product, which is filled from a storage container into a packaging unit, with a rotatably mounted in a housing and designed as a measuring slide, which encloses an opening provided with an opening, the one when filling the cavity Product-containing storage container faces, while it faces the packaging unit during the emptying of the cavity after a rotation of the rotary valve, and a piston for filling and emptying the cavity, the drive of which is arranged on the same side of the housing as the drive of the rotary valve.
Eine derartige Vorrichtung ist aus der EP-A-0 185 958 bekannt geworden. Bei dieser Entgegenhaltung werden die Kräfte zum Verschieben des Kolbens einerseits und zum Verschwenken des Drehschiebers andererseits über die Kolbenstange von einem entsprechenden Antrieb auf die zu bewegenden Teile übertragen. Soweit die Kolbenstange den Kolben in Längsrichtung steuert, versieht sie damit die übliche Funktion einer Kolbenstange. Demgegenüber vermag die Kolbenstange, die zur Verdrehung des Drehschiebers notwendigen Kräfte nur durch eine spezielle Ausgestaltung zu übertragen, die für Kolbenstangen jeweils nicht üblich ist. Diese Ausgestaltung der Kolbenstange muß in der Weise erfolgen, daß bei Schwenkbewegungen der Kolbenstange um ihre Längsachse der Drehschieber mitgenommen wird. Die Kolbenstange darf daher keinen kreisförmigen Querschnitt aufweisen, da sie sich bei einer derartigen Ausgestaltung innerhalb ihrer Lagerung gegenüber dem Drehschieber verschwenken ließe, der aus diesem Grund bei der Ausführung von Schwenkbewegungen nicht mitgenommen werden würde. In erster Linie war daher bei der Ausgestaltung der Kolbenstange bei einem Drehschieber der Entgegenhaltung daran gedacht worden, die Kolbenstange mit einem eckigen Querschnitt, beispielsweise einem rechteckigen oder vorzugsweise quadratischen Querschnitt auszurüsten. Denkbar ist darüber hinaus auch eine Ausgestaltung in jeder anderen Weise, die eine Mitnahme des Drehschiebers bei der Ausführung von Schwenkbewegungen der Kolbenstange garantiert.Such a device has become known from EP-A-0 185 958. In this citation, the forces for moving the piston on the one hand and for pivoting the rotary valve on the other hand are transmitted via the piston rod from a corresponding drive to the parts to be moved. As far as the piston rod controls the piston in the longitudinal direction, it provides the usual function of a piston rod. In contrast, the piston rod can only transmit the forces required to rotate the rotary slide valve by means of a special design which is not customary for piston rods. This configuration of the piston rod must be carried out in such a way that the rotary slide is carried along when the piston rod is pivoted about its longitudinal axis. The piston rod must therefore not have a circular cross-section, since with such a configuration it could be pivoted within its mounting relative to the rotary slide valve, which for this reason the execution of swivel movements would not be taken. In the first place, therefore, when designing the piston rod in a rotary slide valve, the thought was given to equipping the piston rod with an angular cross section, for example a rectangular or preferably square cross section. In addition, a configuration in any other way is also conceivable, which guarantees that the rotary valve is carried along when pivoting the piston rod.
Diese Doppelfunktion der Kolbenstange führte zu einem Verschleiß im Bereich der Führungskanten, der eine exakte Steuerung der Schwenkbewegungen des Drehschiebers nachteilig beeinflußte. Zum Übertragen der für das Verschwenken des Drehschiebers notwendigen Kräfte erwies sich der Querschnitt der Kolbenstange als relativ klein. Darüber hinaus erforderte auch das Einsetzen einer neuen Kolbenstange eine Überarbeitung der gesamten Lagerung, in der die Kolbenstange mit ihrem vom Kolben abgewandten Ende gelagert wurde.This double function of the piston rod led to wear in the area of the guide edges, which adversely affected precise control of the pivoting movements of the rotary valve. The cross-section of the piston rod proved to be relatively small in order to transmit the forces required for pivoting the rotary valve. In addition, the insertion of a new piston rod required a revision of the entire bearing, in which the piston rod was stored with its end facing away from the piston.
Aufgabe der dieser Patentanmeldung zugrunde liegenden Erfindung ist es daher, die Vorrichtung der einleitend genannten Art so zu verbessern, daß sie eine relativ hohe Verschleißfestigkeit aufweist.The object of the invention on which this patent application is based is therefore to improve the device of the type mentioned in the introduction so that it has a relatively high wear resistance.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Drehschieber und der Kolben voneinander getrennte Antriebe aufweisen und daß der Drehschieber an seinem dem Antrieb zugewandten Ende mit einer Anschlußhülse an einer Stelle verbunden ist, die sich in der Nähe des zylindrischen Mantels der Anschlußhülse bezogen auf deren Mittelachse befindet, und daß ein den Drehschieber um seine Längsachse verschwenkender Drehantrieb an die Anschlußhülse angekoppelt ist.This object is achieved in that the rotary valve and the piston have separate drives and that the rotary valve is connected at its end facing the drive with a connecting sleeve at a point which is in the vicinity of the cylindrical jacket of the connecting sleeve with respect to the central axis is located, and that a rotary actuator pivoting about its longitudinal axis is coupled to the connecting sleeve.
Diese Vorrichtung verläßt in wesentlichen Teilen die Konstruktionsprinzipien des aus der Entgegenhaltung bekannt gewordenen Drehschiebers. Die Funktion der Kolbenstange beschränkt sich nunmehr auf die Funktion üblicher Kolbenstangen, die die Kräfte für die Längsbewegungen des Kolbens übertragen hat. Die Kolbenstange wird zur Übertragung der den Drehschieber verschwenkenden Kräfte nicht benutzt. Damit kann bei der Ausbildung der Kolbenstange auf eine Ausbildung verzichtet werden, die geeignet ist, den Drehschieber bei der Ausführung von Schwenkbewegungen anzutreiben. Die Kolbenstange kann jeden beliebigen Querschnitt besitzen, also auch einen kreisförmigen. Damit wird die Herstellung dieser Kolbenstange gegenüber einer solchen mit einem eckigen Querschnitt erheblich billiger und der Verschleiß wird vernachlässigbar gering.This device largely leaves the design principles of the rotary valve known from the document. The function of the piston rod is now limited to the function of conventional piston rods, which has transmitted the forces for the longitudinal movements of the piston. The piston rod is not used to transmit the forces that pivot the rotary valve. This means that when the piston rod is designed, there is no need for a design that is suitable for driving the rotary valve when pivoting movements are carried out. The piston rod can have any cross section, including a circular one. This makes the manufacture of this piston rod considerably cheaper than that with an angular cross section and the wear is negligible.
Der Antrieb des Drehschiebers erfolgt mit Hilfe der Anschlußhülse, die an ihrem äußeren Umfang mit dem Drehschieber verbunden ist und an den Drehantrieb angekoppelt ist. Damit ist gewährleistet, daß die Schwenkkräfte am äußeren Umfang sowohl der Anschlußhülse als auch des Drehschiebers übertragen werden. Eine derartige Anordnung hat den Vorteil, daß das zum Verschwenken des Drehschiebers notwendige Drehmoment an einer günstigen Stelle in den Drehschieber eingeleitet wird. Da die Kräfte am äußeren Umfang der Anschlußhülse übertragen werden, kann diese mit einer relativ kleinen Wandstärke ausgebildet werden, so daß sie leicht und billig ist. Darüber hinaus kann der Drehantrieb sehr leicht und konstruktiv einfach auf der Oberfläche der Anschlußhülse befestigt werden. Schließlich kann die Anschlußhülse auf einfache Weise, nämlich mit Hilfe von Schraubenverbindungen mit dem Drehschieber verbunden werden, so daß eine leichte Montage und Demontage möglich ist, ohne daß der Kolben bzw. die Kolbenstange entfernt werden muß.The rotary slide valve is driven with the aid of the connecting sleeve, which is connected on its outer circumference to the rotary slide valve and is coupled to the rotary drive. This ensures that the pivoting forces on the outer circumference of both the connecting sleeve and the rotary valve are transmitted. Such an arrangement has the advantage that the torque required for pivoting the rotary valve is introduced into the rotary valve at a convenient point. Since the forces are transmitted on the outer circumference of the connecting sleeve, it can be designed with a relatively small wall thickness, so that it is light and cheap. In addition, the rotary drive can be attached to the surface of the connecting sleeve very easily and in a structurally simple manner. Finally, the connecting sleeve can be connected to the rotary valve in a simple manner, namely with the aid of screw connections, so that easy assembly and disassembly is possible without the piston or the piston rod having to be removed.
Weitere Einzelheiten der Erfindung ergeben sich aus der nachfolgenden ausführlichen Beschreibung und den beigefügten Zeichnungen, in denen bevorzugte Ausführungsformen der Erfindung beispielsweise veranschaulicht sind.Further details of the invention will become apparent from the following detailed description and the accompanying drawings, in which preferred embodiments of the invention are illustrated, for example.
In den Zeichnungen zeigen:
- Fig. 1 :
- einen Längsschnitt durch eine Vorrichtung,
- Fig. 2 :
- einen Längsschnitt durch eine andere Vorrichtung und
- Fig. 3 :
- einen Längsschnitt durch eine weitere Vorrichtung.
- Fig. 1:
- a longitudinal section through a device,
- Fig. 2:
- a longitudinal section through another device and
- Fig. 3:
- a longitudinal section through a further device.
Eine Vorrichtung besteht im wesentlicehn aus einem Gehäuse (1), einem Drehschieber (2) und einem Kolbenkopf (3). Der Drehschieber (2) ist mit einem engen Paßsitz 4 in einem Innenraum (5) geführt, der innerhalb des Gehäuses (1) ausgebildet ist. In diesem Innenraum (5) ist der Drehschieber (2) sowohl um seine Längsachse drehbar als auch in axialer Richtung verschieblich gelagert. Die Lagerung erfolgt auf einer dem Gehäuse (1) zugewandten Außenfläche (6) des Drehschiebers (2), die eine ihr gegenüberliegende Innenfläche (7) des Gehäuses (1) gleitend beaufschlagt, die den Innenraum (5) begrenzt.A device consists essentially of a housing (1), a rotary valve (2) and a piston head (3). The rotary valve (2) is guided with a
Der Drehschieber (2) ist als ein Meßbehälter ausgebildet, in dessen Inneren ein Hohlraum (8) vorgesehen ist. Dieser Hohlraum (8) erstreckt sich in axialer Richtung des Drehschiebers (2) und ist annähernd zylindrisch ausgebildet. In diesem Hohlraum (8) gleitet in axialer Richtung der Kolbenkopf (3), an dem eine Kolbenstange (9) befestigt ist, die mit ihrem dem Kolbenkopf (3) gegenüberliegenden Ende (10) aus dem Drehschieber (2) herausragt. Dieser ist an seinem dem Ende (10) der Kolbenstange (9) benachbarten Ende (12) von einer Wandung (11) abgeschlossen, die von einer Öffnung (13) durchdrungen ist. In dieser Öffnung (13) wird die Kolbenstange (9) geführt. Diese hat einen runden oder quadratischen Querschnitt, so daß auch die Öffnung (13) einen entsprechenden Querschnitt aufweist.
Darüber hinaus ist am Ende (10) der Kolbenstange (9) eine Ankopplungsvorrichtung (15) vorgesehen, an der ein die Kolbenstange (9) bewegender nicht dargestellter Antrieb angekoppelt werden kann. Diese Ankopplungsvorrichtung (15) ist als eine Bohrung ausgebildet, die quer zur Längsrichtung der Kolbenstange (9) diese durchdringt.The rotary valve (2) is designed as a measuring container, in the interior of which a cavity (8) is provided. This cavity (8) extends in the axial direction of the rotary valve (2) and is approximately cylindrical. In this cavity (8) the piston head (3) slides in the axial direction, to which a piston rod (9) is attached, which protrudes with its end (10) opposite the piston head (3) from the rotary valve (2). This is closed at its end (10) of the piston rod (9) adjacent end (12) by a wall (11) which is penetrated by an opening (13). The piston rod (9) is guided in this opening (13). This has a round or square cross section, so that the opening (13) also has a corresponding cross section.
In addition, a coupling device (15) is provided at the end (10) of the piston rod (9), to which a drive (not shown) which moves the piston rod (9) can be coupled. This coupling device (15) is designed as a bore which penetrates the piston rod (9) transversely to the longitudinal direction thereof.
Am Ende (12) des Drehschiebers (2) ist in die Wandung (11) eine ringförmige Nut (16) eingelassen, deren einander sich gegenüberliegenden sich in radialer Richtung erstreckenden Wandungen als Gleitflächen (17, 18) ausgebildet sind. Auf diesen Gleitflächen (17, 18) gleitet eine Kupplung (19), die mit einem nicht dargestellten Antrieb verbunden ist, der in der Lage ist, den Drehschieber (2) in axialer Richtung zu verschieben.At the end (12) of the rotary valve (2), an annular groove (16) is embedded in the wall (11), the mutually opposite walls of which extend in the radial direction are designed as sliding surfaces (17, 18). A coupling (19) slides on these sliding surfaces (17, 18), which is connected to a drive, not shown, which is capable of displacing the rotary valve (2) in the axial direction.
Der Drehschieber (2) ragt mit seinem Ende (12) aus einem hinteren Teil (20) des Gehäuses (1) heraus. Auf diesem aus dem Gehäuse (1) herausragenden Ende (12) ist die Nut (16) vorgesehen. Von diesem Ende (12) verläuft die Außenfläche (6) in Richtung auf sein gegenüberliegendes vorderes Ende (21) konisch in der Weise, daß sich die Querschnitte vom hinteren Ende (12) in Richtung auf das vordere Ende (21) verjüngen. In entsprechender Weise ist auch die Innenfläche (7) des Innenraumes (5) konisch ausgebildet, so daß sie im Bereich ihres hinteren Teils (20) ihren größten Querschnitt besitzt.The end of the rotary slide (2) protrudes (12) from a rear part (20) of the housing (1). The groove (16) is provided on this end (12) protruding from the housing (1). From this end (12), the outer surface (6) tapers towards its opposite front end (21) in such a way that the cross sections taper from the rear end (12) towards the front end (21). Correspondingly, the inner surface (7) of the interior (5) is conical, so that it has its largest cross section in the area of its rear part (20).
Der Hohlraum (8) ist an seinem der Wandung (11) benachbarten Ende als eine Reinigungskammer (22) ausgebildet. Diese besitzt einen größeren Querschnitt als ein dem vorderen Teil (21) zugewandter Zylinderteil (23), dessen Querschnitt so bemessen ist, daß der in ihm gleitende Kolbenkopf (3) mit einer so engen Passung geführt wird, daß er in der Lage ist, je nach Bewegungsrichtung innerhalb des Zylinderteils (23) einen Unter- bzw. Überdruck zu erzeugen. Der Kolbenkopf (3) trägt an seinem der Kolbenstange (9) benachbarten Ende eine Kolbenmanschette (24), die mit ihrer Außenfläche (25) für einen druckdichten Abschluß des Kolbenkopfes (3) innerhalb des Hohlraumes (8) sorgt.The cavity (8) is designed as a cleaning chamber (22) at its end adjacent to the wall (11). This has a larger cross section than a front part (21) facing cylinder part (23), the cross section of which is dimensioned such that the piston head (3) sliding in it is guided with such a close fit that it is capable of depending to generate a negative or positive pressure within the cylinder part (23) according to the direction of movement. The piston head (3) carries at its end adjacent to the piston rod (9) a piston sleeve (24), which with its outer surface (25) ensures a pressure-tight seal of the piston head (3) within the cavity (8).
Zwischen der Reinigungskammer (22) und dem Zylinderteil (23) ist eine Übergangszone (26) vorgesehen, in der der Querschnitt des Zylinderteils (23) sich stetig erweitert auf den Querschnitt der Reinigungskammer (22). In der Reinigungskammer (22) sind Zutrittsöffnungen (27) für eine Reinigungsflüssigkeit vorgesehen, die über einen Reinigungsanschluß (28) zugeführt wird.A transition zone (26) is provided between the cleaning chamber (22) and the cylinder part (23), in which the cross section of the cylinder part (23) continually widens to the cross section of the cleaning chamber (22). Access openings (27) for a cleaning liquid are provided in the cleaning chamber (22) and are supplied via a cleaning connection (28).
Dieser Reinigungsanschluß (28) reicht durch das Gehäuse (1) hindurch in den Innenraum (5).This cleaning connection (28) extends through the housing (1) into the interior (5).
Ein weiterer Reinigungsanschluß (33) ist vorgesehen an einem dem vorderen Ende (21) benachbarten vorderen Ende (34) des Gehäuses (1). Dieser Reinigungsanschluß (33) fluchtet mit einer Zutrittsöffnung (35), die im Bereich des vorderen Endes (21) in den Innenraum (5) mündet. Darüber hinaus ist ein weiterer Reinigungsanschluß (36) im Bereich eines Einlaufs (37) vorgesehen, durch den ein abzufüllendes Produkt über eine Bohrung (38) in das Gehäuse (1) und von diesem über eine Öffnung (39) in den Zylinderteil (23) des Hohlraumes (8) eintritt. Der Einlauf (37) kann als eine Rohrleitung ausgebildet sein, die mit einem entsprechend ausgebildeten Flansch fest verbunden ist, der die Bohrung (38) umgibt und mit dem Gehäuse (1) fest verbunden ist.A further cleaning connection (33) is provided on a front end (34) of the housing (1) which is adjacent to the front end (21). This cleaning connection (33) is aligned with an access opening (35) which opens into the interior (5) in the region of the front end (21). In addition, a further cleaning connection (36) is provided in the area of an inlet (37) through which a product to be filled is passed through a bore (38) into the housing (1) and from there via an opening (39) into the cylinder part (23). of the cavity (8) occurs. The inlet (37) can be designed as a pipeline which is fixedly connected to a correspondingly designed flange which surrounds the bore (38) and is fixedly connected to the housing (1).
Das Gehäuse (1) ist an seinem vorderen Ende (34) mit einer Bohrung (41) versehen, deren Querschnitt kleiner als der des ihm benachbarten Innenraumes (5) ist. Diese Bohrung (41) ist von einer Kappe (42) verschlossen, die mit einem Bund in der Bohrung (41) geführt wird. An diesen Bund schließt sich in Richtung auf den Innenraum (5) ein Lagerzapfen (44) an, dessen Querschnitt dem Querschnitt des Zylinderteils (23) entspricht, in den der Lagerzapfen (44) passend hineinragt. Auf diesem Lagerzapfen (44) wird der Drehschieber (2) im Bereich seines vorderen Endes (21) geführt. Diese Kappe (42) wird auf ihrer dem Lagerzapfen (44) abgewandten Außenseite von einer Deckfläche begrenzt, die über den Bund hinausragt und die Bohrung (41) druckdicht verschließt.The housing (1) is provided at its front end (34) with a bore (41), the cross section of which is smaller than that of the interior (5) adjacent to it. This bore (41) is closed by a cap (42) which is guided with a collar in the bore (41). A bearing journal (44) adjoins this collar in the direction of the interior (5), the cross section of which corresponds to the cross section of the cylinder part (23) into which the bearing journal (44) projects. The rotary slide valve (2) is guided in the region of its front end (21) on this bearing journal (44). This cap (42) is delimited on its outside facing away from the bearing journal (44) by a cover surface which projects beyond the collar and closes the bore (41) in a pressure-tight manner.
Der Innenraum (5) besitzt eine Auslaßbohrung (46), die der Bohrung (38) um einen Drehwinkel von etwa 180° bezüglich des Gehäuses (1) gegenüberliegt. Diese Auslaßbohrung (46) fluchtet mit der Öffnung (39) des Drehschiebers (2) und damit mit der Bohrung (38). Sie mündet in ein Mundstück (47), das unmittelbar oberhalb einer abzufüllenden Verpackungseinheit, beispielsweise eines Bechers (48) angeordnet ist. Dieser Becher (48) wird mit Hilfe einer Fördereinrichtung (49), beispielsweise eines Förderbandes in Richtung auf das Mundstück (47) transportiert bzw. von diesem weggefördert.The interior (5) has an outlet bore (46) which is opposite the bore (38) by an angle of rotation of approximately 180 ° with respect to the housing (1). This outlet bore (46) is aligned with the opening (39) of the rotary valve (2) and thus with the bore (38). It opens into a mouthpiece (47), for example, immediately above a packaging unit to be filled a cup (48) is arranged. This cup (48) is transported with the aid of a conveyor device (49), for example a conveyor belt, in the direction of the mouthpiece (47) or is conveyed away therefrom.
Mit der Wandung (11) ist eine Anschlußhülse (70) über Schrauben (71) fest verbunden, die durch einen der Wandung (11) zugewandten Flansch (72) hindurch in Schraubenlöcher (73) hineinragen, die in der Wandung (11) vorgesehen sind. Mit Hilfe der Schrauben (71) wird der der Wandung (11) zugewandte Flansch (72) fest verschraubt.A connection sleeve (70) is firmly connected to the wall (11) by means of screws (71) which protrude through a flange (72) facing the wall (11) into screw holes (73) provided in the wall (11) . With the aid of the screws (71), the flange (72) facing the wall (11) is firmly screwed.
Die Anschlußhülse (70) erstreckt sich in eine vom vorderen Ende (21) abgewandte Richtung und ist als ein Rohrstück ausgebildet, mit dem ein Drehantrieb (75) für den Drehschieber (2) verbunden ist. Dieser Drehantrieb(75)kann beispielsweise als ein Ritzel (76) ausgebildet sein, das auf einer Oberfläche (74) der rohrförmigen Anschlußhülse (70) befestigt, beispielsweise aufgeschrumpft ist. Dieses Ritzel (76) hat eine relativ große Breite, die größer ist als die eines Antriebszahnrades (77), das mit dem Ritzel (76) im Eingriff ist. Dieses Antriebszahnrad (77) ist auf einer Antriebswelle (78) befestigt, die von einem Elektromotor (79) angetrieben wird. Die gegenüber dem Antriebszahnrad (77) vergleichsweise große Breite des Ritzels (76) gestattet eine Verschiebung der Anschlußhülse (70) in deren Längsrichtung, ohne daß deswegen das Antriebszahnrad (77) mit dem Ritzel (76) außer Eingriff gerät.The connecting sleeve (70) extends in a direction facing away from the front end (21) and is designed as a piece of pipe to which a rotary drive (75) for the rotary slide valve (2) is connected. This rotary drive (75) can be designed, for example, as a pinion (76) which is fastened, for example shrunk, onto a surface (74) of the tubular connecting sleeve (70). This pinion (76) has a relatively large width which is larger than that of a drive gear (77) which is in engagement with the pinion (76). This drive gear (77) is fastened to a drive shaft (78) which is driven by an electric motor (79). The comparatively large width of the pinion (76) compared to the drive gear (77) allows the connecting sleeve (70) to be displaced in its longitudinal direction without the drive gear (77) therefore becoming disengaged from the pinion (76).
Die Anschlußhülse (70) hat einen relativ großen Innendurchmesser (80). Ihm entspricht ein von einer Wandung (81) der Anschlußhülse (70) umspannter Innenraum (82), in den die Kolbenstange (9) mit ihrem Ende (10) hineinragt. Innerhalb des Innenraumes (82) kann ein die Kolbenstange bewegender nicht dargestellter Antrieb mit der Ankopplungsvorrichtung (15) in Eingriff gebracht werden.The connecting sleeve (70) has a relatively large inner diameter (80). One of a wall corresponds to it (81) of the connecting sleeve (70) spanned interior (82) into which the piston rod (9) protrudes with its end (10). A drive (not shown) which moves the piston rod can be brought into engagement with the coupling device (15) inside the interior (82).
Die Anschlußhülse (70) wird auf ihrer Oberfläche (74) von der Kupplung (19) mit geringem Spiel umschlossen. Mit Hilfe dieser Kupplung (19) kann sowohl der Drehschieber (2) als auch die mit ihr verbundene Anschlußhülse (70) in ihren Längsrichtungen bewegt werden.The connector sleeve (70) is enclosed on its surface (74) by the coupling (19) with little play. With the help of this coupling (19), both the rotary valve (2) and the connecting sleeve (70) connected to it can be moved in their longitudinal directions.
Aus einem nicht dargestellten Vorratsbehälter wird das abzufüllende Produkt, beispielsweise ein mit festen Bestandteilen durchsetztes Milchprodukt durch den Einlauf (37) in Richtung auf die Bohrung (38) und die Öffnung (39) gefördert, die während der Befüllung des Zylinderteils (23) mit der Bohrung (38) fluchtet. Zur Beschleunigung der Befüllung wird das Produkt dadurch angesaugt, daß der Kolbenkopf (3) in Richtung auf die Reinigungskammer (22) bewegt wird und im Zylinderteil (23) ein Unterdruck erzeugt wird. Die Bewegung des Kolbenkopfes kommt vor Erreichen der Reinigungskammer (22) zum Ende.From a storage container, not shown, the product to be filled, for example a milk product interspersed with solid components, is conveyed through the inlet (37) in the direction of the bore (38) and the opening (39), which during the filling of the cylinder part (23) with the Hole (38) is aligned. To accelerate the filling, the product is sucked in that the piston head (3) is moved in the direction of the cleaning chamber (22) and a negative pressure is generated in the cylinder part (23). The movement of the piston head comes to an end before it reaches the cleaning chamber (22).
Nunmehr wird der Elektromotor (79), bei dem es sich um einen Schrittschaltmotor handeln kann, eingeschaltet, der über das Antriebszahnrad (77) und das Ritzel (66) die Anschlußhülse (70) und damit den Drehschieber (2) um einen Winkel von 180° verdreht. Dabei gelangt die Öffnung (39) in den Bereich der Auslaßbohrung (46). Sobald die Öffnung (39) mit der Auslaßbohrung (46) fluchtet, wird der Kolbenkopf (3) in Richtung auf das vordere Ende (21) bewegt und dabei das im Zylinderteil (23) enthaltene Produkt durch die Auslaßbohrung (46) in Richtung auf den Becher (48) ausgestoßen.Now the electric motor (79), which can be a stepping motor, is switched on, which via the drive gear (77) and the pinion (66) connects the connecting sleeve (70) and thus the rotary valve (2) through an angle of 180 ° twisted. The opening (39) reaches the area of the outlet bore (46). As soon as the opening (39) is aligned with the outlet bore (46), the piston head (3) is moved towards the front end (21) and the product contained in the cylinder part (23) through the outlet bore (46) towards the Ejected cup (48).
Sobald der Kolbenkopf (3) seine vordere Position im Bereich des vorderen Endes (21) erreicht hat, wird der Drehschieber (2) um seine Mittelachse gedreht, bis neuerdings die Öffnung (39) mit der Bohrung (38) fluchtet. In dieser Stellung kann das Produkt in die Öffnung (39) eintreten. Zur Vergrößerung der Eintrittsgeschwindigkeit wird der Kolbenkopf (3) in Richtung auf die Reinigungskammer (22) bewegt, so daß in einem dem vorderen Ende (21) benachbarten Teil des Zylinderteils (23) neuerdings ein Unterdruck entsteht, der das Produkt in den Zylinderteil (23) ansaugt.As soon as the piston head (3) has reached its front position in the region of the front end (21), the rotary slide valve (2) is rotated about its central axis until the opening (39) is aligned with the bore (38). In this position, the product can enter the opening (39). In order to increase the entry speed, the piston head (3) is moved in the direction of the cleaning chamber (22), so that a vacuum is now created in a part of the cylinder part (23) which is adjacent to the front end (21) and which pushes the product into the cylinder part (23 ) sucks.
Zum Zwecke der Reinigung der Vorrichtung wird der Drehschieber (2) mit Hilfe der Kupplung (19) in Richtung auf sein hinteres Ende (12) aus dem Paßsitz (4) herausgezogen. Dabei genügt eine relativ kleine Versetzung des Drehschiebers (2). Um die Größe dieser Versetzung gleitet das Antriebszahnrad (77) durch die mit ihm im Eingriff befindlichen Zähne des Ritzels (76). Diese Versetzung reicht aus, um im Hinblick auf die konische Ausbildung sowohl der Innenfläche (7) als auch der Außenfläche (6) den Sitz des Drehschiebers (2) innerhalb des Innenraumes (5) so weitgehend zu lockern, daß eine durch die Reinigungsanschlüsse (28) und (33) eintretende Reinigungsflüssigkeit sich zwischen die Außenfläche (6) einerseits und die Innenfläche (7) andererseits durchdrücken kann. Darüber hinaus tritt durch den Reinigungsanschluß (33) die Reinigungsflüssigkeit in den Bereich des vorderen Endes (21) des Drehschiebers (2) so daß auch diese in dem gewünschten Umfange gereinigt wird. Dabei tritt die Reinigungsflüssigkeit durch den Reinigungsanschluß (33) sowohl über den Bund (44) in den Hohlraum (8) als auch über die Außenfläche (6) in die Öffnung (39) ein. Schließlich gelangt Reinigungsflüssigkeit durch den Reinigunsanschluß (36) in den Einlauf (37) und damit in den Hohlraum (8). Gleichzeitig wird der Kolbenkopf (3) bis in die Reinigungskammer (22) zurückgezogen, so daß er dort allseits von der durch die Zutrittsöffnung (27) zutretenden Reinigungsflüssigkeit umspült wird. Dabei ist der Querschnitt der Reinigungskammer (22) so gewählt, daß der Kolbenkopf (3) an ihren Innenwandungen nicht anliegt, wenn er in sie hineingezogen ist. Auf diese Weise wird der Kolbenkopf (3) allseitig von Reinigungsmittel umspült, das die Reinigungskammer (22) über eine Auslaßöffnung (50) verläßt, die im Drehschieber (2) vorgesehen ist und mit einer Ablaßöffnung (51) fluchtet, die im Gehäuse (1) vorgesehen ist und aus der Reinigungsflüssigkeit in Richtung auf einen nicht dargestellten Auffangbehalter austritt.For the purpose of cleaning the device, the rotary valve (2) is pulled out of the snug fit (4) in the direction of its rear end (12) with the aid of the coupling (19). A relatively small displacement of the rotary valve (2) is sufficient. The drive gear (77) slides by the size of this displacement through the teeth of the pinion (76) which are in engagement with it. This offset is sufficient to loosen the seat of the rotary valve (2) within the interior (5) to such an extent that, due to the conical shape of both the inner surface (7) and the outer surface (6), that a through the cleaning connections (28 ) and (33) entering cleaning liquid between the outer surface (6) on the one hand and the inner surface (7) on the other. In addition, the cleaning liquid passes through the cleaning connection (33) into the region of the front end (21) of the rotary slide valve (2), so that it is also cleaned to the desired extent. The cleaning liquid enters through the cleaning connection (33) both via the collar (44) into the cavity (8) and via the outer surface (6) into the opening (39). Finally, cleaning liquid gets through the cleaning connection (36) into the Inlet (37) and thus into the cavity (8). At the same time, the piston head (3) is pulled back into the cleaning chamber (22), so that it is washed around on all sides by the cleaning liquid that enters through the access opening (27). The cross section of the cleaning chamber (22) is selected so that the piston head (3) does not rest on its inner walls when it is drawn into it. In this way, the piston head (3) is flushed on all sides with cleaning agent, which leaves the cleaning chamber (22) via an outlet opening (50) which is provided in the rotary valve (2) and is aligned with a drain opening (51) which is in the housing (1 ) is provided and emerges from the cleaning liquid in the direction of a collecting container, not shown.
Nachdem alle mit dem Produkt in Kontakt gewesenen Teile mit Reinigungsflüssigkeit ausgiebig umspült worden sind, wird der Reinigungsvorgang beendet. Zu diesem Zwecke wird der Zulauf von Reinigungsflüssigkeit zu den Reinigungsanschlüssen (28, 33, 36) unterbrochen und der Drehschieber (2) mit Hilfe der Kupplung (19) in axialer Richtung auf das vordere Ende (21) bewegt, so daß der enge Paßsitz (4) wieder hergestellt wird. In dieser Lage kann neuerdings die Befüllung der Becher (48) wieder aufgenommen werden, die auf der Fördereinrichtung (49) herantransportiert werden.After all parts in contact with the product have been thoroughly rinsed with cleaning liquid, the cleaning process is ended. For this purpose, the supply of cleaning fluid to the cleaning connections (28, 33, 36) is interrupted and the rotary valve (2) is moved in the axial direction onto the front end (21) by means of the coupling (19), so that the tight fit ( 4) is restored. In this position, the filling of the cups (48) can be resumed, which are transported up to the conveyor (49).
Es ist auch möglich, über die Anschlußhülse (70) unmittelbar die für das Verschieben des Drehschiebers (2) notwendigen Kräfte in diesen einzuleiten. Zu diesem Zwecke kann auf die Kupplung (19) verzichtet werden. Vielmehr wird die Anschlußhülse (70) über ein Zwischenstück (83) durch die Schrauben (71) unmittelbar mit dem Drehschieber (2) verbunden. Das Zwischenstück (83) dient lediglich dazu, eine Gleitbuchse (84) aufzunehmen, in der die Öffnung (13) zur Lagerung der Kolbenstange (9) vorgesehen ist.It is also possible, via the connecting sleeve (70), to introduce the forces necessary for displacing the rotary slide valve (2) directly into the latter. For this purpose, the coupling (19) can be omitted. Rather, the connecting sleeve (70) is connected directly to the rotary valve (2) via an intermediate piece (83) by means of the screws (71). The spacer (83) only serves to receive a sliding bush (84) in which the opening (13) is provided for mounting the piston rod (9).
Ein Antrieb (85) zur Verschiebung des Drehschiebers (2) in dessen Längsrichtung ist auf der Oberfläche (74) außer dem in Figur 2 nicht dargestellten Drehantrieb (75) befestigt. Dieser Verschiebeantrieb (85) besteht im wesentlichen aus einem Ring (86), der auf der Oberfläche (74) in Längsrichtung der Anschlußhülse (70) unverschieblich befestigt, beispielsweise aufgeschrumpft ist. Dieser Ring (86) ist gegenüber einem Mitnehmer (87) drehbar gelagert, der lediglich Bewegungen in Längsrichtung der Anschlußhülse (70), nicht jedoch Drehbewegungen durchführen kann. Die drehbare Lagerung des Mitnehmers (87) gegenüber dem Ring (86) kann beispielsweise mit Hilfe eines Rillenkugellagers (88) erfolgen, das die zum Verschieben des Drehschiebers (2) notwendigen Kräfte vom Mitnehmer (87) auf den Ring (86) überträgt. Es ist jedoch auch möglich, statt eines Rillenkugellagers (88) ein Gleitlager zwischen dem Mitnehmer (87) und dem Ring (86) anzuordnen.A drive (85) for displacing the rotary valve (2) in its longitudinal direction is attached to the surface (74) in addition to the rotary drive (75), which is not shown in FIG. 2. This displacement drive (85) consists essentially of a ring (86) which is fixed immovably on the surface (74) in the longitudinal direction of the connecting sleeve (70), for example shrunk on. This ring (86) is rotatably mounted with respect to a driver (87) which can only perform movements in the longitudinal direction of the connecting sleeve (70), but not rotary movements. The rotatable mounting of the driver (87) relative to the ring (86) can take place, for example, with the aid of a deep groove ball bearing (88) which transmits the forces required to move the rotary valve (2) from the driver (87) to the ring (86). However, it is also possible to arrange a slide bearing between the driver (87) and the ring (86) instead of a deep groove ball bearing (88).
Der Mitnehmer kann beispielsweise als eine sich in Längsrichtung der Anschlußhülse parallel zu deren Oberfläche (74) erstreckende Verschiebehülse (89) ausgebildet sein, die an ihrem dem Ring (86) zugewandten Ende mit einer den Ring (86) aufnehmenden Nut (90) versehen ist, in der der Ring (86) drehbar gelagert ist. Auf der Verschiebehülse (89) kann beispielsweise eine sich in Längsrichtung der Anschlußhülse (70) erstreckende Zahnstange (91) befestigt sein, in deren Zähne ein von einem nicht dargestellten Antriebsmotor angetriebenes Ritzel (92) eingreift. Je nach der gewünschten Verschieberichtung des Drehschiebers (2) wird das Ritzel (92) in die eine oder andere Richtung bewegt. Es nimmt die Zahnstange (91) und damit den Ring (86) mit, über den der Drehschieber (2) entweder in die Reinigungsposition gezogen oder aus dieser wieder in die Befüllposition zurückgeschoben wird.The driver can, for example, be designed as a sliding sleeve (89) extending in the longitudinal direction of the connecting sleeve parallel to its surface (74), which is provided at its end facing the ring (86) with a groove (90) receiving the ring (86) , in which the ring (86) is rotatably mounted. A rack (91) extending in the longitudinal direction of the connecting sleeve (70), for example, can be fastened to the sliding sleeve (89) and a toothed pinion (92) driven by a drive motor (not shown) engages in the teeth thereof. Depending on the desired direction of displacement of the rotary valve (2), the pinion (92) moved in one direction or the other. It takes the rack (91) and thus the ring (86) with it, via which the rotary slide (2) is either pulled into the cleaning position or pushed out of this back into the filling position.
Es ist auch möglich, das Zwischenstück (83) unmittelbar mit der Anschlußhülse (70) zu verbinden, so daß diese unmittelbar über die Schrauben (71) mit dem Drehschieber (2) verbunden ist. Zu diesem Zwecke ist die Anschlußhülse (70) an ihrem dem Drehschieber (2) zugewandten Ende mit einem Flansch (93) versehen, durch den die Schrauben (71) hindurch in den Drehschieber (2) hineinragen. Dieser Flansch (93) liegt unmittelbar an einer am Drehschieber (2) vorgesehenen radial verlaufenden Auflagefläche (94) an. Außerdem dient der Flansch (93) zur Aufnahme der Gleitbuchse (84), in der die Kolbenstange (9) gelagert ist. Durch die unmittelbare Verbindung der Anschlußhülse (70) mit dem Drehschieber (2) wird eine kurze, gedrungene Konstruktion angestrebt, die eine Anordnung sowohl des Drehantriebes (75) als auch des Verschiebeantriebes (85) an einer Stelle gestattet, die möglichst nahe am Drehschieber (2) liegt. In jedem Falle ist jedoch die Verbindung der Anschlußhülse (70) mit dem Drehschieber (2) so gewählt, daß die zur Verdrehung des Drehschiebers (2) notwendigen Drehmomente an einer Stelle in den Drehschieber (2) eingeleitet werden, die möglichst weit am äußeren Umfange des Drehschiebers (2) liegt.It is also possible to connect the intermediate piece (83) directly to the connecting sleeve (70) so that it is connected directly to the rotary slide valve (2) via the screws (71). For this purpose, the connecting sleeve (70) is provided at its end facing the rotary valve (2) with a flange (93) through which the screws (71) protrude into the rotary valve (2). This flange (93) bears directly on a radially extending support surface (94) provided on the rotary slide valve (2). In addition, the flange (93) serves to receive the slide bush (84) in which the piston rod (9) is mounted. The direct connection of the connecting sleeve (70) to the rotary valve (2) is aimed at a short, compact construction which allows the rotary actuator (75) as well as the sliding actuator (85) to be arranged at a point as close as possible to the rotary valve ( 2) lies. In any case, however, the connection of the connecting sleeve (70) to the rotary valve (2) is selected so that the torques necessary for rotating the rotary valve (2) are introduced into the rotary valve (2) at one point, as far as possible on the outer circumference of the rotary valve (2).
Die Kolbenstange (9) kann jeden beliebigen Querschnitt aufweisen, beispielsweise einen kreisförmigen oder eckigen Querschnitt. Die Wahl eines kreisförmigen Querschnittes bietet sich an, da er eine billige und einfache Gestaltung der Gleitbuchse (84) zuläßt. Die Lagerung des Drehschiebers (2) erfolgt sowohl zum Zwecke der Ausführung von Drehbewegungen als auch von axialen Bewegungen auf einer Lagerbuchse (52).The piston rod (9) can have any cross section, for example a circular or angular cross section. The choice of a circular cross section is advisable since it allows a cheap and simple design of the slide bush (84). Warehousing of the rotary valve (2) is carried out on a bearing bush (52) both for the purpose of executing rotary movements and of axial movements.
Claims (21)
- Apparatus for measuring off a product which is capable of flow and which is introduced from a supply container into a packaging unit, comprising a rotary value member (2) which is rotatably mounted in a housing and which is in the form of a measuring container and which encloses a cavity provided with an opening (39) which in filling of the an cavity is towards a supply container containing the product while in emptying of the cavity it is towards the packaging unit after a rotary movement of the rotary value member (2), and a piston for filling and emptying of the cavity, the drive of the piston being arranged on the same side of the housing (1) as the drive of the rotary value member (2), characterised in that the rotary value member (2) and the piston have drives which are separate from each other and that at its end (12) which is towards the drive the rotary value member (2) is connected to a connecting sleeve (70) at a location which is in the vicinity of the cylindrical peripheral portion of the connecting sleeve with respect to its central axis, and that a rotary drive (75) for pivoting the rotary valve member (2) about its longitudinal axis is coupled to the connecting sleeve (70).
- Apparatus according to claim 1 characterised in that fixed on the connecting sleeve (70) is a pinion (76) which is in engagement with a a drive motor.
- Apparatus according to claim 2 characterised in that the pinion (76) is shrunk on to the connecting sleeve (70).
- Apparatus according to claim 1 characterised in that the connecting sleeve (70) is connected to a stepping mechanism.
- Apparatus according to claim 4 characterised in that the stepping mechanism is flange-connected to the connecting sleeve (70).
- Apparatus according to claims 1 to 5 characterised in that the connecting sleeve (70) is connected to the rotary valve member (2) by way of a flange (72, 93).
- Apparatus according to claim 6 characterised in that the connecting sleeve (70) is screwed by its flange (72, 93) to the end (12) of the rotary valve member (2).
- Apparatus according to claim 6 and claim 7 characterised in that the connecting sleeve (70) bears with its flange (72) against an intermediate portion (83) which represents a connection between the connecting sleeve (70) and the rotary valve member (2) and is fixedly connected to the end (12) of the latter.
- Apparatus according to claim 8 characterised in that the intermediate portion (83) is connected by screws both to the end (12) of the rotary valve member (2) on the one hand and also to the connecting sleeve (70) on the other hand.
- Apparatus according to claims 1 to 9 characterised in that the cavity (8) in the rotary valve member (2) is in the form of a cylinder in which the piston is mounted slidably in the longitudinal direction of the rotary valve member (2).
- Apparatus according to claim 10 characterised in that the piston is provided with a piston rod (9) which projects out of the end (12) of the rotary valve member (2).
- Apparatus according to claim 11 characterised in that the piston rod (9) is supported in the intermediate portion (83).
- Apparatus according to claim 11 characterised in that the piston rod (9) is supported in the flange (72, 93) of the connecting sleeve (70).
- Apparatus according to claims 1 to 13 characterised in that the rotary valve member (2) is mounted slidably in its longitudinal direction in the housing (1).
- Apparatus according to claim 14 characterised in that a coupling means (19) engages the intermediate porton (83), the coupling means being connected to a drive for moving the rotary valve member (2) in its longitudinal direction.
- Apparatus according to claim 14 and claim 15 characterised in that provided in the intermediate portion (83) is a groove (16) which extends from the outside surfaces thereof defining same in a direction towards the piston rod (9) extending through the intermediate portion and against the flanks of which the coupling means (19) bears with a flange which projects into the groove (16).
- Apparatus according to claim 14 characterised in that a displacement drive (85) for displacing the rotary valve member (2) in its longitudinal direction is coupled to the connecting sleeve (70) by way of a displacement coupling means.
- Apparatus according to claim 17 characterised in that the displacement coupling means is in the form of a ring (86) which is fixed on a surface (74) of the connecting sleeve (70) and which is mounted rotatably relative to an entrainment portion (87) which engages over the ring (86) on its outer periphery remote from the connecting sleeve (70) and which is connected to the displacement drive (85).
- Apparatus according to claim 17 and claim 18 characterised in that the displacement drive (85) is in the form of a rack (91) which is fixed on the entrainment portion (87) in the longitudinal direction of the connecting sleeve (70) and with which meshes a drive gear (77) which is driven by a motor (79).
- Apparatus according to claims 1 to 19 characterised in that the piston rod (9) is of an angular cross-section.
- Apparatus according to claims 1 to 19 characterised in that the piston rod (9) is of a round cross-section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87105596T ATE91985T1 (en) | 1986-04-19 | 1987-04-15 | DEVICE FOR MEASURING A FLOWABLE PRODUCT. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3613266 | 1986-04-19 | ||
DE19863613266 DE3613266A1 (en) | 1986-04-19 | 1986-04-19 | DEVICE FOR MEASURING A FLOWABLE PRODUCT |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0242786A2 EP0242786A2 (en) | 1987-10-28 |
EP0242786A3 EP0242786A3 (en) | 1988-09-07 |
EP0242786B1 true EP0242786B1 (en) | 1993-07-28 |
Family
ID=6299064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87105596A Expired - Lifetime EP0242786B1 (en) | 1986-04-19 | 1987-04-15 | Device for measuring a fluid product |
Country Status (6)
Country | Link |
---|---|
US (1) | US4867351A (en) |
EP (1) | EP0242786B1 (en) |
AT (1) | ATE91985T1 (en) |
CA (1) | CA1279045C (en) |
DE (2) | DE3613266A1 (en) |
DK (1) | DK189287A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001083299A1 (en) * | 2000-05-04 | 2001-11-08 | Sig Pack Sapal S.A. | Machine for metering and filling liquid or pasty products |
DE102010005033A1 (en) | 2010-01-15 | 2011-07-21 | Sig Technology Ag | Method and device for filling products |
US8534507B2 (en) * | 2011-05-11 | 2013-09-17 | Mike Gronholm | Granule dispensers |
WO2015162114A1 (en) * | 2014-04-25 | 2015-10-29 | Bühler AG | Depositing machine having a plug-in connection |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US845572A (en) * | 1906-05-31 | 1907-02-26 | Scott Peck | Measuring device. |
GB521504A (en) * | 1938-11-16 | 1940-05-23 | Bror Anders Emil Johnson | Improved apparatus for and method of distributing portions of paste or other semi-liquid material |
CH351135A (en) * | 1958-12-22 | 1960-12-31 | Kustner Freres Cie Sa | Moulder-dosing machine for pasty material |
US3140018A (en) * | 1962-10-15 | 1964-07-07 | Theodore A Miller | Powder dispensing unit |
US3335724A (en) * | 1964-07-24 | 1967-08-15 | Erich M Gienapp | Remote control, repeating, variable stroke hypodermic syringe device |
US3844002A (en) * | 1973-03-16 | 1974-10-29 | Gen Tire & Rubber Co | Gripper assembly for jacking mechanisms |
US4084729A (en) * | 1975-08-28 | 1978-04-18 | Maryland Cup Corporation | Dispensing valve |
DE3412628C2 (en) * | 1984-04-04 | 1986-05-15 | Benz & Hilgers GmbH, 4000 Düsseldorf | Device for the metered filling of flowable or pasty contents into containers |
DE3443557A1 (en) * | 1984-11-29 | 1986-05-28 | Lieder Maschinenbau GmbH & Co KG, 3033 Schwarmstedt | METHOD AND DEVICE FOR MEASURING A FLOWABLE PRODUCT |
-
1986
- 1986-04-19 DE DE19863613266 patent/DE3613266A1/en not_active Withdrawn
-
1987
- 1987-04-13 US US07/038,395 patent/US4867351A/en not_active Expired - Fee Related
- 1987-04-13 DK DK189287A patent/DK189287A/en not_active Application Discontinuation
- 1987-04-15 EP EP87105596A patent/EP0242786B1/en not_active Expired - Lifetime
- 1987-04-15 AT AT87105596T patent/ATE91985T1/en not_active IP Right Cessation
- 1987-04-15 DE DE8787105596T patent/DE3786691D1/en not_active Expired - Fee Related
- 1987-04-16 CA CA000534944A patent/CA1279045C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE3786691D1 (en) | 1993-09-02 |
DK189287A (en) | 1987-10-20 |
EP0242786A3 (en) | 1988-09-07 |
ATE91985T1 (en) | 1993-08-15 |
DK189287D0 (en) | 1987-04-13 |
EP0242786A2 (en) | 1987-10-28 |
US4867351A (en) | 1989-09-19 |
CA1279045C (en) | 1991-01-15 |
DE3613266A1 (en) | 1987-10-22 |
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