RU94212U1 - WEIGHT DOSER FOR FINE BULK MATERIALS - Google Patents

Abstract

 A weighing batcher for finely divided bulk materials containing two screw feeders for coarse and precise dosing, a weighing device and a product bag, characterized in that a conveyor device is additionally introduced into the batcher, by means of which packets are transferred from the coarse dosing screw feeder to the precision dosing screw feeder and said weighting device is structurally located under the auger feeder for precise dosing.

Description

The utility model relates to dosing equipment and can be used for dosing finely divided bulk dusting materials in the chemical, food and building materials industries, with a view to their subsequent packaging.

Known weight dispenser for bulk materials (utility model certificate No. 38323 publ. 06/10/2004) containing a coarse dosing screw feeder with a shut-off flap, a hopper with a double leaf bottom and a hopper, to the outlet of which the mechanism for clamping the bag is attached, and the exact feeder auger feeder with a slam shutter located above the receiving hopper, and a second weighing barrel with a double leaf bottom.

The disadvantage of this device is not high productivity, due to the need to pour the same dose several times (set in a weighing hopper, pouring the dose into the receiving hopper, and then in the package (container).

The purpose of the claimed utility model is to increase the performance of the dispenser with high precision dosing.

To achieve this goal, a weighing device for fine granular bulk materials, containing two screw feeders for coarse and accurate dosing, a weighing device and a product bag, additionally introduces a conveying device through which packets are transferred from the coarse dosing screw feeder to the precision dosing screw feeder, and the aforementioned weighing device is structurally located under the screw feeder accurate dosing.

The essence of the invention is that dosing is carried out in two stages: coarse (volumetric) dosing and accurate (weight) dosing, and dosing is carried out directly in a packaging container (package). To this end, the inventive dispenser further comprises a conveying device on which the product bag is placed, and the weighing device is located directly under the auger feeder for precise dosing. This arrangement of the weighing device allows the product to be refilled in the bag at the same time as weighing, ensuring high dosing accuracy. The presence of a conveying device allows coarse dialing (volumetric dosing) and accurate dialing (weight dosing) in parallel: while the next packet is filled using volumetric dosing, accurate dosing is performed in the previous packet.

Comparative analysis with the prototype shows that the claimed technical solution differs in the composition of the device (additionally contains a conveying device and the product is loaded directly into the container without a weighing hopper and a receiving hopper) and the relative position of the feeding screws and weighing device, which ensures the technical solution meets the “Novelty” criterion.

The figure shows the inventive device. The device comprises a coarse dosing screw feeder pos. 1, a product bag pos. 2, a weighing device pos. 3, a conveying device pos. 4, feeding product packages from a screw feeder pos. 1 to a precision metering screw feeder pos. 5. The dispenser also contains a control unit pos.6, which controls the screw feeders.

The device operates as follows. The package for the product (packaging) item 2 is installed on the conveying device item 4 under the coarse dosing screw feeder, the control unit item 6, receiving a signal about the presence of containers, turns on the screw feeder item 1, which delivers the product to the package in accordance with the specified screw speed. After a given volume of product is poured into the package pos.2, the screw feeder pos.1 is turned off. The device pos.4 moves the package pos.2 to the weighing device pos.3, which is structurally located so that the package pos.2 located on the weighing device pos.3 is located under the screw feeder of the exact set pos.5. The weighing device weighs the dose that has been collected, and the weighing results are transmitted to the control unit, which determines the required amount of refill. Depending on the required amount of refill, the control unit generates a signal to turn on the auger feeder for precise dosing and the product is refilled to the required dose.

The device has been tested in pilot industrial conditions, where its high productivity and dosing accuracy have been confirmed.

Sources of information taken into account during the examination

1. Certificate for utility model RU No. 38323 IPC B65B 1/12

Claims (1)

A weighing batcher for finely divided bulk materials containing two screw feeders for coarse and precise dosing, a weighing device and a product bag, characterized in that a conveyor device is additionally introduced into the batcher, by means of which packets are transferred from the coarse dosing screw feeder to the precision dosing screw feeder , and said weighting device is structurally located under the screw feeder for precise dosing.