DE29913368U1 - Device for dosing floury to granular bulk materials - Google Patents

Description

Device for dosing floury to granular bulk materials.

The invention relates to a device for dosing powdery to granular bulk materials. Can be used primarily in bagging and mixing systems.

There are devices known that can only be used for floury or granular bulk materials, since the product particles are partially destroyed in them.

In addition, it is very time-consuming to clean the known devices when changing products in order to avoid contamination.

The cleaning work also requires a lot of personnel and time.

Not only the dosing device but also the surrounding area must be cleaned, as it is inevitable that dust and product will escape.

With the known devices there is also hardly any possibility of adapting the device to the flow behavior of the bulk material during dosing and thus achieving optimal dosing performance and accuracy.

The invention is therefore based on the object of creating a device of the type mentioned at the beginning, with which both floury and granular bulk materials can be dosed with optimum dosing performance and accuracy, without destroying the product particles and avoiding contamination when changing products. Cleaning when changing products should be eliminated.

This task is solved by a special shape of the storage and discharge hopper (pos. 1) which receives the bulk material to be dosed and ensures that it is completely emptied at the end of the batch.

A loosening spiral (pos. 6) has the task of evenly feeding the product to the product guide (pos. 9) when the slide plate (pos. 10) is open.

The invention is described below with reference to the embodiments illustrated in the drawings. They show:

Fig. 1 Side view of the dosing device.

Fig. 2 Functional drawing of the dosing device

\ in working position, coarse dosing.

Fig. 3 Functional drawing of the dosing device

in working position, agent dosing.

Fig. 4 Functional drawing of the dosing device

in working position, fine dosing.

Fig. 5 Functional drawing of the dosing device

in working position, basic position-dosing.

Fig. 6 List of positions of the slide plate

with control of the compressed air cylinders.

The dosing device illustrated in Fig. 1 essentially comprises:

Storage and discharge hopper ( 1 )

Product feed ( 2 )

Inspection opening ( 3 )

Drive for loosening spiral ( 4 )

Loosening spiral ( 5 )

Drive for fine dosing screw ( 6 )

Fine dosing screw ( 7 )

Product management ( 8 )

Valve housing ( 9 )

Slide plate ( 10 )

Pneumatic cylinder 1 for slide plate ( 11 )

Pneumatic cylinder 2 for slide plate ( 12 )

Pneumatic cylinder 3 for slide plate ( 13 )

Fine dosing flap ( 14 ) Pneumatic cylinder 4 for fine dosing flap ( 15 ) Pneumatic cylinder 5 for fine dosing flap ( 16 )

Product discontinuation (17 )

When the slide plate is open (Pos. 10, open position), caused by simultaneous control of the compressed air cylinders 1-3 (Pos. 1,12,13) and by control of the loosening spiral (Pos. 5), a large product flow (high performance) is directed to the product outlet (Pos. 16) (Fig. 3 Coarse dosing).

After reaching a certain product quantity, the slide plate (Pos. 10) can be moved to any of the 6 middle positions (Fig. 6) and a reduced product flow can be directed to the product outlet (Pos. 16) (Fig. 4, agent dosing).

After a further quantity of product has been reached, the slide plate (item 10) is closed (position 0) and the loosening spiral is switched off. A small product flow is now directed to the product outlet (item 16) through the fine dosing flap (item 14), which is still open and is controlled by the compressed air cylinders 4+5 (items 15, 16), in conjunction with the controlled fine dosing screw (item 7) (Fig. 5 Fine dosing).

After reaching the final product quantity, the fine dosing flap (pos. 14) is closed and the fine dosing screw (pos. 7) is stopped

(Fig. 2 Basic position-dosing).

The high closing speed of the fine dosing flap (pos. 14), achieved by two compressed air cylinders 4+5 (pos. 15, 16), ensures a high dosing accuracy.

The 8 different positions of the slide plate (Pos. 10) are achieved by controlling the pneumatic cylinders 1-3 (Pos. 11,12,13) with different piston strokes, individually or several at the same time (Fig. 6).

Claims (5)

1. Device for dosing floury to granular bulk materials, with a high dosing capacity and high dosing accuracy, without contamination when changing products, characterized in that a 45 degree installation position of the slide plate (item 11), in conjunction with a sharp-edged product guide (item 9), achieves a self-cleaning effect. 2. Device according to 1, characterized in that a loosening spiral (pos. 6) ensures a uniform product supply to the product guide (pos. 9). 3. Device according to 1, characterized in that by connecting three compressed air cylinders (items 12, 13, 14) with different strokes, a selection of 8 different slide positions is made, thereby adapting the slide opening to the different flow behavior of the products and thus achieving optimum performance. With this one device, a large number of different products can be dosed. 4. Device according to 1, characterized in that by installing a fine dosing flap (item 15) in the slide plate (item 11) in conjunction with the fine dosing screw (item 8), a very high dosing accuracy is achieved. 5. Device according to 1, characterized in that the entire device with storage and discharge funnel (item 1) and slide body (item 10) forms a self-contained unit and thus no product or dust escape is possible.