KR-102963913-B1 - Devices and methods for recovering and re-injecting over-weighing powders

KR102963913B1KR 102963913 B1KR102963913 B1KR 102963913B1KR-102963913-B1

Abstract

According to one embodiment of the present disclosure, an apparatus and method for recovering and re-feeding over-measured powder may be provided, comprising: one or more powder transfer lines for transferring powder supplied from a powder supply unit; a loading chamber in which powder transferred through a first connecting pipe connected to the powder transfer line is loaded; a storage hopper in which the loaded powder is transferred and stored through the opening of an opening/closing valve disposed at the bottom of the loading chamber; a powder metering unit disposed on both sides or one side of the loading chamber or the storage hopper; a rotary valve connected to the bottom of the storage hopper for normally discharging powder stored in the storage hopper; a micro rotary valve disposed in the storage hopper for recovering powder exceeding a target supply amount; a recovery chamber connected to the micro rotary valve for storing the recovered powder; and a control unit for controlling the rotary valve and the micro rotary valve.

Inventors

양지윤
지영준

Assignees

에스케이온 주식회사

Dates

Publication Date: 20260512
Application Date: 20231222

Claims (17)

As a device for recovering and reintroducing over-measured powder, One or more powder conveying lines for conveying powder supplied from a powder supply unit; A loading chamber in which powder transported through a first connecting pipe connected to the powder transport line is loaded; A storage hopper in which the above-mentioned loaded powder is transferred and stored through the opening of an opening/closing valve located at the bottom of the loading chamber; A powder metering unit disposed on both sides or one side of the loading chamber or storage hopper to meter powder transferred to the storage hopper; A rotary valve connected to the bottom of the storage hopper to normally discharge the powder stored in the storage hopper; A micro rotary valve configured to be placed in the storage hopper and connected to the recovery chamber, to discharge powder exceeding a preset target supply amount into the recovery chamber for recovery, and to reintroduce the recovered excess powder into the storage hopper; and A device for recovering and re-feeding over-measured powder, comprising a control unit that compares the amount of the measured powder with the preset target supply amount and controls the rotary valve and the micro rotary valve.
In claim 1, A device for recovering and re-feeding over-measured powder, wherein the control unit operates the rotary valve when the amount of powder measured by the powder metering unit is equal to the target supply amount, and operates the micro rotary valve when the amount of powder measured by the powder metering unit exceeds the target supply amount.
In claim 1, A first vacuum line connected to a second connecting pipe connected to the storage hopper above; A second vacuum line connected to the upper part of the recovery chamber; An air line connected to the upper part of the recovery chamber and one end of the second vacuum line; A first vacuum valve disposed in the first vacuum line above; A second vacuum valve disposed in the second vacuum line above; and It further includes an air valve disposed in the above air line, The above control unit To transfer powder to the storage hopper, the operation of the first vacuum valve of the first vacuum line is controlled, and To recover powder into the recovery chamber, the operation of the second vacuum valve of the second vacuum line is controlled, and A device for recovering and re-feeding over-measured powder, controlling the operation of the air valve of the air line to re-feed the powder into the storage hopper.
In claim 3, The above-described micro rotary valve is selectively positioned at a specific location among the upper side of the storage hopper, the lower side of the storage hopper, and the side of the loading chamber to recover and re-feed powder, and is a device for recovering and re-feeding over-measured powder.
In claim 3, A device for recovering and reintroducing over-measured powder, wherein an air filter for filtering air introduced through the air line is disposed within the recovery chamber.
In claim 2, The above control unit To determine whether the accumulated number of operation cycles for excess powder discharge of the above-mentioned micro rotary valve exceeds a preset number of operation cycles, the accumulated number of operation cycles is compared with the preset number of operation cycles, and A device for recovering and re-feeding over-measured powder, which controls the micro rotary valve so that when the accumulated number of operation cycles for discharging excess powder of the micro rotary valve exceeds the preset number of operation cycles, the powder recovered in the recovery chamber is re-feeded into a storage hopper through a recovery and re-feed line.
In claim 6, The above control unit A device for recovering and re-feeding over-measured powder, which controls the powder transfer through the powder transfer line to continue when the accumulated number of operation cycles for discharging excess powder of the micro rotary valve is less than a preset number of operation cycles.
In claim 3, The above control unit A device for recovering and re-feeding over-measured powder, which controls the formation of a vacuum by opening the first vacuum valve of the first vacuum line and closing the second vacuum valve of the second vacuum line when transferring powder to the storage hopper.
In claim 3, The above control unit A device for recovering and re-feeding over-measured powder, which controls the formation of a vacuum by closing the first vacuum valve of the first vacuum line and opening the second vacuum valve of the second vacuum line when recovering powder into the recovery chamber.
In claim 3, The above control unit A device for recovering and re-feeding over-measured powder, which controls the supply of air by closing the second vacuum valve of the second vacuum line and opening the air valve of the air line when re-feeding powder into the storage hopper.
As a method for recovering and reintroducing over-measured powder, A powder transfer step of transferring powder through one or more powder transfer lines to load it into a loading chamber, and then transferring the loaded powder to a storage hopper; A powder weighing step for weighing the powder transferred to the storage hopper through a powder weighing unit disposed in the storage hopper; A comparison step in which the amount of the measured powder is compared with the preset target supply amount to determine whether the measured powder exceeds the preset target supply amount in the control unit; A recovery step in which, if the amount of the above-measured powder exceeds the above-set target supply amount, the excess powder is discharged into a recovery chamber through a micro rotary valve for recovery; and A method for recovering and reintroducing over-measured powder, comprising a reintroduction step of reintroducing the recovered excess powder into the storage hopper.
In claim 11, The above control unit To determine whether the accumulated number of operation cycles for excess powder discharge of the above-mentioned micro rotary valve exceeds a preset number of operation cycles, the accumulated number of operation cycles is compared with the preset number of operation cycles, and A method for recovering and re-feeding over-measured powder, wherein if the accumulated number of operation cycles for discharging excess powder of the above-mentioned micro rotary valve exceeds a preset number of operation cycles, the powder recovered in the recovery chamber is re-feeded into a storage hopper through a recovery and re-feed line.
In claim 12, A method for recovering and re-feeding over-measured powder, wherein the micro rotary valve is selectively positioned at a specific location among the upper side of the storage hopper, the lower side of the storage hopper, and the side of the loading chamber to recover and re-feed powder.
In claim 12, The above control unit A method for recovering and re-feeding over-measured powder, wherein if the accumulated number of operation cycles for discharging excess powder of the above-mentioned micro rotary valve is less than a preset number of operation cycles, the powder transfer through the powder transfer line is controlled to continue.
In claim 11, The above control unit A method for recovering and re-feeding over-measured powder, wherein, in the powder transfer step above, when transferring powder through the one or more powder transfer lines, a first vacuum valve of a first vacuum line connected to a vacuum pump that forms a vacuum is opened, and a second vacuum valve of a second vacuum line at the top of a recovery chamber is closed to form a vacuum.
In claim 11, The above control unit A method for recovering and reintroducing over-measured powder, wherein, in the recovery step above, when the powder discharged by the micro rotary valve is recovered into the recovery chamber, the first vacuum valve of the first vacuum line is closed and the second vacuum valve of the second vacuum line is opened to form a vacuum.
In claim 12, The above control unit A method for recovering and re-feeding over-measured powder, wherein, in the above re-feeding step, when the recovered powder is re-feeded into a storage hopper through the recovery and re-feeding line, the second vacuum valve of the second vacuum line is closed and the air valve of the air line connected to the second vacuum line is opened to supply air.

Description

Devices and methods for recovering and re-injecting over-weighing powders The present disclosure relates to an apparatus and method for recovering and reintroducing over-measured powder. A powder conveying device refers to a device that conveys solid powders ranging in form from fine powder to diameters of several centimeters. In this regard, while screw conveyor types, rope conveyor types, and suction conveyor types were conventionally used to convey powders, powder conveying devices utilizing vacuum conveyor types are primarily used to ensure the rapid and safe transport of powder raw materials. Generally, a vacuum conveyor-type powder conveying and weighing device as described above consists of a vacuum conveyor for conveying powder and a load cell for weighing powder. The vacuum conveyor-type powder transport and weighing device described above transports a target amount of powder via a vacuum conveyor utilizing a vacuum pump, and measures the transported powder using a load cell. If the measured amount of transported powder does not reach the target amount, additional powder is transported to achieve the target quantity. Additional transfer of powder via the above vacuum conveyor is typically achieved by adjusting the approximate amount of powder through the on/off switch of the vacuum pump or the operation of an analog dial. However, since precise transfer of powder is difficult with such approximate additional transfer, precise metering of the powder is achieved to some extent by additionally utilizing a pinch valve and a vacuum break valve. Nevertheless, due to the characteristics of the secondary battery industry, the additional powder transfer method using such pinch valves and vacuum break valves reveals limitations in precise weighing of powders when transferring various types of powders with different specific gravities and compositions, particularly when transferring small quantities of low-density powders. FIG. 1 is a block diagram illustrating a device for recovering and reintroducing over-measured powder according to one embodiment. FIG. 2 is a block diagram illustrating various placement positions of a micro rotary valve according to one embodiment. FIG. 3 is a flowchart illustrating a method for recovering and reintroducing over-measured powder according to one embodiment. The objects, advantages, and features of the present disclosure will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings, but the present disclosure is not necessarily limited thereto. Furthermore, in describing the present disclosure, detailed descriptions of related prior art are omitted where it is determined that such detailed descriptions may unnecessarily obscure the essence of the present disclosure. The terms used to describe one embodiment of the present disclosure are not intended to limit the present disclosure. It should be understood that singular expressions include plural expressions unless otherwise specified in the context. Drawings may be schematic or exaggerated for the purpose of illustrating embodiments. In this document, expressions such as "have," "can have," "include," or "can include" refer to the existence of the relevant feature (e.g., numerical values, functions, actions, or components, etc.) and do not exclude the existence of additional features. Terms such as "one," "other," "another," "first," and "second" are used to distinguish one component from another, and the components are not limited by these terms. The embodiments described in this document and the accompanying drawings are not intended to limit the present disclosure to specific embodiments. It should be understood that the present disclosure includes various modifications, equivalents, and/or alternatives to the embodiments. Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the attached drawings. FIG. 1 is a block diagram illustrating a device for recovering and reintroducing over-measured powder according to one embodiment. The device for recovering and re-feeding over-measured powder according to the present disclosure comprises: one or more powder transfer lines ( LA , B , LC , LD ) for transferring powder supplied from a powder supply unit; a loading chamber (5) in which powder transferred via a first connecting pipe ( C1 ) connected to the powder transfer lines ( LA , B , LC , LD ) is loaded; a storage hopper (10) in which the loaded powder is transferred and stored through the opening of an opening/closing valve (V) disposed at the bottom of the loading chamber (5); a powder metering unit (20) disposed on both sides or one side of the loading chamber (5) or the storage hopper (10); a rotary valve (30) connected to the bottom of the storage hopper (10) for normally discharging powder stored in the storage hopper (10); a micro rotary valve (60) disposed in the loading chamber (5) or the storage h