Device and method for storing products

Abstract

A method and a device used to store a product inside a receptacle. The product includes a first liquid component and at least a second component. Inside the receptacle, the product is circulated by a conveying apparatus which is positioned in the region of a tubular guide element arranged inside a receptacle. At least one component of the product fed to the receptacle flows first into an internal space of the guide element.

Claims

1. A device for storing a product, comprising: a receptacle for storing a product which consists of a first liquid component and at least a second component that is a solid, chunky component, the receptacle having a base; a vertical tubular guide element arranged inside the receptacle with a spacing from the base so as to be oriented with a longitudinal axis in a vertical direction; a conveying apparatus for the product, the conveying apparatus including a propeller positioned in a lower region of the guide element so as to create a vertical flow through the guide element to create a suction for transporting the solid component of the product in a vertical direction to an interior of the guide element and so as to mix the first and the second components along the vertical flow through the guide element; and at least one feed pipe for at least one component of the product opens out into an opening in a side wall of the guide element, wherein the feed pipe has an internal cross-section and the opening in the side wall of the guide element has a cross-section equal to the internal cross-section of the feed pipe so that the entire internal cross-section of the feed pipe opens directly into the guide element to enable streaming of the product with the solid components in the interior of the guide element, wherein the at least one feed is fixed in position in a region of a wall of the receptacle and is attached to the tubular guide elements so as to hold and position the tubular guide element whereby the guide element is held by the feed pipe and the feed pipe opens in the guide element in a lower part of the wall of the guide element, wherein the propeller has at least one blade that extends from a shaft in a radial direction, wherein said blade has a shape to effect said suction in the vertical direction, wherein the guide element has a lower end with a first opening directed to the base of the receptacle and an upper end with a second opening directed away from the base of the receptacle, the first opening and the second opening being surrounded by the wall of the guide element, wherein the conveying apparatus includes a motor coupled to the propeller to rotate the propeller in the suction direction, the motor and the propeller being arranged to create a reversible flow direction in the guide element, the guide element having at least one directing element that suppresses formation of rotary flows inside the guide element and promotes formation of flows in the vertical direction, wherein the base of the receptacle has an upper central region with a bulge directed toward the first opening of the guide element, wherein said bulge is surrounded by a circular depression in the base.

2. The device according to claim 1, wherein of the guide element is spaced from the base of the receptacle at a spacing of about 1.3 times an average particle size of the second component.

3. The device according to claim 1, and further comprising a filling level measuring device connected to the receptacle.

4. The device according to claim 3, and further comprising a filling level regulating device connected to the filling level measuring device.

5. The device according to claim 1, wherein a conveying direction of the conveying apparatus is reversible.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) FIG. 1 shows a diagrammatic view in vertical section of the device in an embodiment for a product with sinking particles,

(2) FIG. 2 shows an embodiment that has been modified with respect to FIG. 1,

(3) FIG. 3 shows the embodiment in FIG. 2 with a direction of flow inside the guide element from top to bottom,

(4) FIG. 4 shows the arrangement in FIG. 3 with a reversed direction of flow,

(5) FIG. 5 shows a vertical section through another embodiment of the device, and

(6) FIG. 6 shows a cross-section along the line of section VI-VI in FIG. 5.

DETAILED DESCRIPTION OF THE INVENTION

(7) According to the exemplary embodiment in FIG. 1, a tubular guide element (3) is arranged in an internal space (1) of a receptacle (2). The guide element (3) extends essentially vertically with a longitudinal axis (4). In the exemplary embodiment shown, the receptacle (2) has a circular contour in a horizontal sectional plane and the guide element (3) is positioned essentially concentrically inside the receptacle (2).

(8) The internal space (1) serves to receive a product (5) to be stored. Inside the receptacle (2), the product has a filling level (6). A sensor (7) connected to a filling level measuring device (8) serves to detect the filling level (6).

(9) According to an exemplary embodiment, the guide element (3) can have a circular cross-sectional area in a horizontal sectional plane. Other rounded or angular cross-sectional areas are, however, feasible too. A lower end (9) of the guide element (3) is arranged with a spacing (10) from a base (11) of the receptacle (2). In the exemplary embodiment shown, a widening of the cross-section (12) is provided in the region of the lower end (9). FIG. 1 also shows that a widening of the cross-section (14) is made in the region of an upper end (13) of the guide element (3).

(10) A feed pipe (15) for the product (5) opens out into the guide element (3). It is in particular proposed that the feed line (15) is fixed in the region of a wall (16) of the receptacle (2) and that the guide element (3) is held and positioned by the feed pipe (15), as shown in FIGS. 1-6.

(11) A conveying apparatus (17) for the product (5) is arranged inside the guide element (3). The conveying apparatus (17) can take the form of a propeller which is coupled to a drive (19) by a shaft (18).

(12) In the exemplary embodiment shown, the base (11) has a contour (20) such that a central region of the base (11) is arranged at a higher level than peripheral regions of the base (11). The base (11) is thereby curved towards the guide element (3).

(13) The embodiment in FIG. 1 shows a filling level (6) below the upper end (13) of the guide element (3). This embodiment is practical in the case of settling particles.

(14) In the embodiment in FIG. 2, a plurality of filling pipes (21) arranged in the region of the base (11) connect the receptacle (2) to associated filling devices. It can also be seen in FIG. 2 that at least one directing element (22) arranged in the region of the guide element (3) suppresses the formation of rotary flows inside the guide element (3) and promotes the formation of flows in the direction of the longitudinal axis (4). For example, three directing elements (22) in the form of guide plates which are each arranged at 120 relative to one another at the circumference of the guide element (3) can, for example, be arranged in the region of the lower end (9) of the guide element (3).

(15) FIG. 3 shows an embodiment in which the product (5) has a second component (23) with a tendency for floating. This can, for example, be caused by the second component (23) having a lower specific weight than the first component. In the case of such a product (5), a vertical direction of conveying from top to bottom inside the guide element (3) is predetermined. The floating second component (23) is consequently sucked into the guide element (3) and mixed there with the first component. A filling level inside the internal space (1) is approximately 30% of a maximum structural height. The upper end (13) of the guide element (3) has a spacing (24) from the filling level (6).

(16) In the case of floating particles as shown in FIG. 3, a filling level (6) above the upper end of the guide element (3) is required in order to ensure that the floating particles are sucked in and that the resulting mixing is effected. However, the spacing (24) must also not be so large that the suction effect would then be reduced.

(17) In the exemplary embodiment in FIG. 4, a product (5) is stored, the second component (23) of which has a tendency to settle. This can, for example, be caused by the second component (23) having a greater specific weight than the first component. When such a product (5) is stored, a vertical direction of conveying from bottom to top inside the guide element (3) is predetermined in order to suck the second component (23) which has settled in the region of the base (11) into the guide element (3) and mix it there with the first component.

(18) FIG. 5 shows a view of the receptacle (2) with greater structural detail. The shape of the guide element (3) and the supporting of the guide element (3) by the feed pipe (15) are in particular illustrated again.

(19) It can be seen from the horizontal section in FIG. 6 that, in the embodiment according to FIG. 5, four directing elements (22) are used which are each arranged at 90 relative to one another in the circumferential direction of the guide element (3). In this exemplary embodiment, the conveying apparatus (17) is provided with four propeller blades.

(20) In the case of a product (5) which has chunky ingredients, the spacing (10) is typically dimensioned such that the spacing (10) is 1.3 times an average particle size. Such a dimensioning has also proved to be expedient for the spacing (24).

(21) In a typical embodiment, the conveying apparatus (17) rotates at approximately 300 revolutions per minute. The drive (19) can be designed with frequency control.

(22) A diameter of the guide element (3) is typically approximately 0.2 to 0.8 times the diameter of the receptacle (2). This refers to the internal diameter in each case. A flow rate of approximately 400 mm/sec is typically generated by the conveying apparatus (17) inside the guide element (3).

(23) The fluctuations in level inside the receptacle (2) which have already been mentioned above can in particular result in continuous feeding of the product or of components of the product, and in discontinuous removal of the product for filling the containers.

(24) When at least two components of the product are fed in separately, it is also possible that the components are mixed only inside the receptacle (2). The individual components of the product are then typically fed in via respective separate feed pipes.

(25) In another embodiment, it is proposed that the guide element (3) is provided along its longitudinal extent with at least one narrowing of the cross-section and that the feeding of the product or the at least one component of the product is provided in this region. A higher flow rate, which helps with blending, is created by the narrowed portion.