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WO2020233912A1 - Dispositif de mesure d'un flux massique et de dosage d'un matériau en vrac ainsi que procédé de dosage d'un matériau en vrac - Google Patents

Dispositif de mesure d'un flux massique et de dosage d'un matériau en vrac ainsi que procédé de dosage d'un matériau en vrac Download PDF

Info

Publication number
WO2020233912A1
WO2020233912A1 PCT/EP2020/060679 EP2020060679W WO2020233912A1 WO 2020233912 A1 WO2020233912 A1 WO 2020233912A1 EP 2020060679 W EP2020060679 W EP 2020060679W WO 2020233912 A1 WO2020233912 A1 WO 2020233912A1
Authority
WO
WIPO (PCT)
Prior art keywords
bulk material
conveyor
measuring
conveying
channel
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.)
Ceased
Application number
PCT/EP2020/060679
Other languages
German (de)
English (en)
Inventor
Robert Weinand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qlar Europe GmbH
Original Assignee
Schenck Process Europe GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schenck Process Europe GmbH filed Critical Schenck Process Europe GmbH
Publication of WO2020233912A1 publication Critical patent/WO2020233912A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
    • G01F13/001—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups for fluent solid material
    • G01F13/005—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups for fluent solid material comprising a screw conveyor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • G01G13/16—Means for automatically discharging weigh receptacles under control of the weighing mechanism
    • G01G13/20—Means for automatically discharging weigh receptacles under control of the weighing mechanism by screw conveyors in the weigh receptacle

Definitions

  • the invention relates to a device for measuring a mass flow and metering bulk material, with a conveyor channel for transferring bulk material to be metered from an inlet side to an outlet side of the conveyor channel, with a conveyor arranged in the conveyor channel for conveying the bulk material from the inlet side to the outlet side of the conveyor channel , and with a
  • the invention also relates to a method for metering bulk material with such a device.
  • a feed metering device for measuring bulk material is already known from WO 2009/065524 A1.
  • the document discloses a conveyor dosing device for bulk material with a motor-driven conveyor for conveying the bulk material, the conveyor being mounted separately and completely floating, with a number of measuring devices being provided which are designed to measure the weight load on the conveyor, a screw conveyor, by the To determine bulk material.
  • Weight is calculated as the mean value of several measuring devices, assuming a uniformly distributed load and thus a constant load by the bulk material. However, this assumption is only correct for homogeneous bulk solids, the density and flow properties of which remain largely constant and do not contain any impurities, agglomerates or foreign bodies.
  • a feed metering device is also known from WO 2013/026574 A1.
  • a dosing device for bulk goods with a horizontally extending, motor-driven one arranged at an outlet opening of a bulk goods container
  • the conveyor is designed to convey the bulk material from an entry area to an exit area, and wherein the entry area is arranged below the bulk material container and the exit area is supported on at least one first measuring device.
  • the measuring device serves to determine the weight load on the conveying means by the bulk goods, the conveying means being suspended from the bulk goods container at the entry area in a freely floating manner.
  • a triangular line load is assumed to record the weight in the corresponding measuring device. In order to achieve good metering accuracy, this requires a constant and steady course of the
  • the prior art always has the disadvantage that when using screw conveyors, i. E. a screw tube lying in a trough, rotating around its central axis, as a conveying means the weight detection of the conveyed bulk material is often relatively imprecise. On the one hand, part of the bulk material is supported on the worm shaft when the weight is recorded. On the other hand, the bulk material descends in front of the driving screw spiral and / or towards the side housing wall. The resulting shifts in the center of gravity cause errors in weight recording and
  • a device for measuring and metering a mass flow of bulk material is to be provided which enables the bulk material to be weighed as precisely as possible.
  • Bulk material can be dispensed particularly precisely dosed.
  • the conveying means has several congruent flelices which have a common central axis.
  • a Helix a shaftless screw conveyor.
  • the flange of a helix is self-supporting and describes a spiral around the central axis of the screw conveyor, the flange extending between an inner and an outer radius.
  • the helices are designed so that they go through
  • Congruence images such as rotation, mirroring and / or parallel displacement, can be converted into one another. They are symmetrical to one another, in particular axially symmetrical about their central axis or axis of rotation.
  • the conveying means is formed by at least two helices that are of identical design.
  • the helices are arranged with respect to one another in such a way that they have a common central axis.
  • the helices are
  • Central axis i.e. designed as a multi-start screw, in particular as a double-start screw. This means that the helices rotate around the same axis as one
  • the helices are arranged coaxially to one another.
  • the helices of the conveyor rotate about their common central axis when the conveyor is driven.
  • the funding means can have two helices.
  • the two or more helices can be of the same type, preferably the same, with regard to their outer diameter and / or their core diameter, i.e. their inside diameter and / or their pitch, preferably with their constant
  • the resulting load is distributed essentially evenly, ie in equal parts, to the individual helices.
  • the helices can be offset from one another by half a pitch and / or by half a revolution, ie by 180 °.
  • a conveyor with two helices will necessarily be symmetrical
  • the n helices can each be rotated by a 1 / n pitch and / or by a 1 / n revolution, i.e. be arranged offset from one another by 360 h. This advantageously ensures that the bulk material is conveyed evenly through the helices.
  • the funding preferably the
  • Helices be prestressed in the axial direction in the conveyor channel.
  • the helices are axially pretensioned via a spring assembly in a bearing supporting the conveying means. This allows the deflection of the helices and thus of the conveying means to be additionally reduced.
  • measuring devices can be provided which are arranged and designed to determine the weight load on the conveying means by the bulk material.
  • the weight of the bulk material which is made up of the individual weight measurements of the multiple measuring devices, can thus be recorded continuously and reliably.
  • the first measuring device can be formed by two load cells and the second measuring device by one load cell. For reasons of symmetry there are at least three
  • an adjustable gap can be formed between the helices and an inner wall of the conveying channel which is lower in the direction of gravity.
  • the conveying channel has a tubular or trough-shaped housing in which the helices are arranged. This advantageously makes it possible to adjust the gap as a function of a grain size of the bulk material to be conveyed.
  • the gap is a maximum of 5 times as large, preferably a maximum of 2 times as large as an average grain size of the bulk material.
  • the object of the invention is also achieved by a method for dosing
  • Bulk material of the device by means of a first measuring device on an inlet side of a conveying channel in order to regulate a (dispenser) inlet quantity; - Measuring the weight of the bulk material of the device by means of a second
  • Measuring device on an exit side of the conveyor channel for determining a
  • Mass flow of the bulk material conveyed in the conveying channel - Comparing the determined mass flow with a predetermined target mass flow; Adaptation of a conveying speed of a conveying means as a function of the comparison between the determined mass flow and the specified target mass flow.
  • the invention relates to a device and a method for measuring and metering a bulk material mass flow.
  • Dosing devices with conventional conveying means for example a screw, in which no satisfactory accuracy is achieved due to their screw tube and the bulk material that is supported on it and therefore not precisely recorded by measurement, and an absolute accuracy of the measurement of the degree of filling of the
  • the (conveying) device according to the invention has two symmetrically arranged flelices which are pretensioned in a loose bearing supporting the flelices. This eliminates or at least reduces the deflection due to its own weight and a gap between one
  • Conveyor channel housing / the conveyor channel and the helices can be made small and constant.
  • a feeder is controlled via two load cells at the inlet / inlet side and the load is regulated to a constant level.
  • a conveying means which has two symmetrically arranged and prestressed helices.
  • FIG. 1 shows a perspective representation of a device according to the invention with several similar cylindrical helices as a conveying means
  • FIG. 4 shows a schematic block diagram of a method according to the invention The figures are only of a schematic nature and serve exclusively
  • FIGS. 1 and 2 show a device 1 according to the invention for measuring a mass flow and metering bulk material.
  • the device 1 has a conveyor channel 2 by means of which bulk material to be metered can be transferred from an inlet side 3 to an outlet side 4 of the conveyor channel 2.
  • Conveying channel 2 a conveyor 5 is arranged, which is designed to
  • the device 1 To convey bulk material from the inlet side 3 to the outlet side 4 of the conveyor channel 2.
  • the device 1 also has a drive unit 6 which drives the conveyor 5 at an adjustable speed, so that the conveyor 5 rotates about its own axis.
  • the conveyor 5 has several, shown in the
  • the multiple flelices 7 are designed to be congruent to one another.
  • the conveying channel 2 has a circular cross section and encloses a cavity in which the bulk material / bulk material is conveyed.
  • An allocator or inlet quantity of bulk material is introduced into the conveying channel 2 on the inlet side 3 via a distributor channel 8.
  • a discharge amount of bulk material is on the
  • Exit side 4 is discharged from the conveying channel 2 via an exit channel 9.
  • the conveying means 5 has two shaft journals 10 by means of which it is rotatably mounted on the inlet side 3 and on the outlet side 4 with respect to the conveying channel 2.
  • a self-aligning bearing 11 designed as a fixed bearing, is arranged for mounting the one shaft journal 10.
  • a self-aligning bearing 12 designed as a floating bearing for mounting the other shaft journal 10
  • the drive unit 6 is arranged on the entry side 3 and drives the conveying means 5 via the shaft journal 10.
  • the conveyor 5 is biased in the axial direction.
  • the preload is implemented in the self-aligning bearing 12.
  • the device 1 has several measuring devices 13.
  • a first measuring device 14 is arranged on the inlet side 3 of the conveying channel 2 and a second one Measuring device 15 is arranged on exit side 4 of conveyor channel 2.
  • the first measuring device 14 is formed by a first load cell 16 and a second load cell 17.
  • the second measuring device 15 is formed by a third load cell 18.
  • the device 1 thus stands on a “tripod” formed by the three load cells 16, 17, 18.
  • the load cells 16, 17, 18 are arranged below a housing 19 of the conveying channel 2 in the direction of gravity.
  • a gap 21 is formed between an outer diameter of the conveying means 5 and a lower inner wall 20 of the housing 19 of the conveying channel 2.
  • the gap 21 is adjustable and over the axial extent of the
  • Conveying channel 2 largely constant.
  • the conveying means 5 has the two flelices 7, which have a common axis of rotation and are arranged offset from one another by 180 °.
  • a first helix 22 of the two flelices 7 has the same external diameter as a second helix 23 of the two flelices 7.
  • the first helix 22 has the same core diameter or
  • the first helix 22 has the same axial extension 24 as the second helix 23.
  • An axial extension 24 is defined by the axial extension of the coils, i. winding flange that defines flelices 7.
  • the first helix 22 is arranged in the axial direction on the same flea as the second helix 23, so that the two flelices 7 completely overlap in the axial direction.
  • the first helix 22 has the same pitch 25 as the second helix 23.
  • the first helix 22 has the same pitch as the second helix 23.
  • the first helix 22 has the same winding direction as the second helix 23.
  • the first helix 22 has the same number of turns as the second helix 23.
  • the first helix 22 is arranged offset by half the pitch 25 to the second helix, so that the conveying means 5 has a uniform pitch of turns.
  • the first helix 22 and the second helix 23 are each attached to the shaft journal 10, so that when the shaft journal 10 rotates, they rotate about their common central axis at the same speed.
  • a first step 26 the bulk material is fed to the device 1 via a feeder channel 8 via a feeder.
  • the second step 27 the second step 27
  • Measuring device 14 measured on the inlet side 3 of the conveyor channel 2. Based on the measurement of the weight load, in a third step 28 the dispenser or inlet amount is regulated to a desired inlet amount. In a fourth step 29, the bulk material is by means of a regulated drive unit 6 by means of the
  • the weight loading of the bulk material is measured by means of the second measuring device 15 on the outlet side 4 of the conveying channel 2.
  • the conveyed mass flow of bulk material is determined in the conveying channel 2.
  • a conveying speed of the conveying means 5 is adapted, for example via a control of the speed of the drive unit 6, as a function of the comparison between the determined mass flow and the target mass flow.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Conveyors (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)

Abstract

La présente invention concerne un dispositif (1) de mesure d'un flux massique et de dosage d'un matériau en vrac, pourvu d'un canal de transport (2) pour transférer le matériau en vrac à doser d'un côté d'entrée (3) à un côté de sortie (4) du canal de transport (2), pourvu d'un moyen de transport (5) disposé dans le canal de transport (2) pour transporter le matériau en vrac du côté d'entrée (3) au côté de sortie (4) du canal de transport (2), et pourvu d'une unité d'entraînement (6) pour entraîner le moyen de transport (5). Le moyen de transport (5) comprend plusieurs hélices (7) congruentes qui possèdent un axe central commun. La présente invention concerne en outre un procédé de dosage d'un matériau en vrac.
PCT/EP2020/060679 2019-05-23 2020-04-16 Dispositif de mesure d'un flux massique et de dosage d'un matériau en vrac ainsi que procédé de dosage d'un matériau en vrac Ceased WO2020233912A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019113718.7A DE102019113718A1 (de) 2019-05-23 2019-05-23 Vorrichtung zum Messen eines Massenstroms und Dosieren von Schüttgutmaterial sowie Verfahren zum Dosieren von Schüttgutmaterial
DE102019113718.7 2019-05-23

Publications (1)

Publication Number Publication Date
WO2020233912A1 true WO2020233912A1 (fr) 2020-11-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/060679 Ceased WO2020233912A1 (fr) 2019-05-23 2020-04-16 Dispositif de mesure d'un flux massique et de dosage d'un matériau en vrac ainsi que procédé de dosage d'un matériau en vrac

Country Status (2)

Country Link
DE (1) DE102019113718A1 (fr)
WO (1) WO2020233912A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116969132A (zh) * 2023-08-17 2023-10-31 无锡时代桃源环保设备有限公司 一种预处理杂质输出总量在线计量方法及其系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0502264A1 (fr) * 1991-03-07 1992-09-09 Gain Lab Corp. Vibrateur et vis combinée dans un dispositif de transport utilisé pour le pesage de matériau en poudre
WO1996006030A1 (fr) * 1994-08-24 1996-02-29 Hyer Industries, Inc. Extracteur a vis a plusieurs spires concentriques
US20070290008A1 (en) * 2006-06-15 2007-12-20 Schenck Accurate, Inc. Apparatus for conveying material in a dispensing system
WO2009065524A1 (fr) 2007-11-20 2009-05-28 Schenck Process Gmbh Transporteur-doseur
DE102008061339A1 (de) * 2008-12-11 2010-06-17 Brabender Technologie Kg Dosiervorrichtung für Schüttgüter mit unterschiedlicher Fließfähigkeit
WO2013026574A1 (fr) 2011-08-24 2013-02-28 Schenck Process Gmbh Dispositif doseur à auto-étalonnage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015002770A1 (de) * 2015-03-05 2016-09-08 Schenck Process Gmbh Vorrichtung und Verfahren zur Förderung von Schüttgut in einen Druckraum

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0502264A1 (fr) * 1991-03-07 1992-09-09 Gain Lab Corp. Vibrateur et vis combinée dans un dispositif de transport utilisé pour le pesage de matériau en poudre
WO1996006030A1 (fr) * 1994-08-24 1996-02-29 Hyer Industries, Inc. Extracteur a vis a plusieurs spires concentriques
US20070290008A1 (en) * 2006-06-15 2007-12-20 Schenck Accurate, Inc. Apparatus for conveying material in a dispensing system
WO2009065524A1 (fr) 2007-11-20 2009-05-28 Schenck Process Gmbh Transporteur-doseur
DE102008061339A1 (de) * 2008-12-11 2010-06-17 Brabender Technologie Kg Dosiervorrichtung für Schüttgüter mit unterschiedlicher Fließfähigkeit
WO2013026574A1 (fr) 2011-08-24 2013-02-28 Schenck Process Gmbh Dispositif doseur à auto-étalonnage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116969132A (zh) * 2023-08-17 2023-10-31 无锡时代桃源环保设备有限公司 一种预处理杂质输出总量在线计量方法及其系统
CN116969132B (zh) * 2023-08-17 2024-06-04 无锡时代桃源环保设备有限公司 一种预处理杂质输出总量在线计量方法及其系统

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