DE2443548A1 - Screen cloth wear monitor - by incorporating electrically conductive threads which form part of resistance measuring circuit - Google Patents
Screen cloth wear monitor - by incorporating electrically conductive threads which form part of resistance measuring circuitInfo
- Publication number
- DE2443548A1 DE2443548A1 DE2443548A DE2443548A DE2443548A1 DE 2443548 A1 DE2443548 A1 DE 2443548A1 DE 2443548 A DE2443548 A DE 2443548A DE 2443548 A DE2443548 A DE 2443548A DE 2443548 A1 DE2443548 A1 DE 2443548A1
- Authority
- DE
- Germany
- Prior art keywords
- control
- electrically conductive
- wear
- threads
- screen cloth
- 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.)
- Pending
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 3
- 239000011362 coarse particle Substances 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000012216 screening Methods 0.000 abstract 1
- 238000007873 sieving Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Einrichtung zur Kontrolle des Verschleies technisch beanspruchter Stoffbahnen. Device to control the wear of technically demanding Panels of fabric.
Die Erfindung betrifft eine Linrichtung zur Kontrolle des Verschleilåes technisch beanspruchter Stoffbahnen, nämlich Siebgewebe, Filterfilze und dgl.The invention relates to a Linrichtung for the control of the Verschleilåes technically stressed webs of material, namely sieve fabrics, filter felts and the like.
Beim Absieben bzw. rirennen von Schüttgütern mit Grob- und Feinanteil macht sich immer wieder störend bemerkbar, wenn der Siebverschleiß bzw. der Siebbruch zu spät festgestellt wird. Oft wird dann eine größere vne bereits sauber abgesiebten Feingutes wieder vermischt und muß deshalb nochmals nachgesiebt werden. Vollends unangenehm ist dies, wenn das vermeintliche Feingut bereits mit anderen Produkten im Laufe eines Produktionsprozesses vermischt ist, also eine Wachsiebung nicht mehr möglich ist.When sieving or running bulk goods with coarse and fine content repeatedly becomes noticeable when the screen is worn or broken detected too late. Often a larger vne is then already neatly screened off Fine goods are mixed again and must therefore be sieved again. Completely This is uncomfortable when the supposed fine material has already been mixed with other products is mixed in the course of a production process, i.e. no more wax sieving is possible.
Entsprechendes gilt sinngemäß für Filteranlagen zum Trennen von Feststoffen aus Gasen und Flüßigkeiten, wenn ein Bruch des Filtertuches zunächst unbemerkt bleibt.The same applies mutatis mutandis to filter systems for separating solids from gases and liquids if a break in the filter cloth initially goes unnoticed.
Durch die Erfindung soll eine Möglichkeit geschaffen werden, den Verschleiß der Siebgewebe, Filtertücher usw. rechtzeitig zu erkennen, um die geschilderten -Rachteile zu vermeiden.The invention is intended to provide a way of reducing wear the sieve mesh, filter cloths, etc. to recognize in good time to the described -Avoid disadvantage.
As wird eine Einrichtung der eingangs genannten Art geschaffen, bei der in die zu kontrollierende Stoffbahn wenigstens ein elektrisch leitender Faden in Abständen eingelegt ist, der zur Feststellung seiner mit dem Verschleiß handinhandgehender Querschnittsabnahme mit einer Meßeinrichtung zur Ermittlung der Zunahme seines elektrischen-Widerstandes verbunden ist.As a facility of the type mentioned is created at the at least one electrically conductive thread in the web to be checked is inserted at intervals to determine its hand-in-hand with wear Cross-section decrease with a measuring device to determine the increase in its electrical resistance connected is.
Zweckmäßigerweise ist die Einrichtung zur ermittlung der Zunahme des elektrischen Widerstandes einleine Stromquelle und ein Amperemeter umfassender Stromkreis, in den der Kontrollfaden bzw, die Kontrollfäden einschaltbar sind.The device for determining the increase in the electrical resistance a single power source and an ammeter circuit, in which the control thread or the control threads can be switched on.
Vorteilhafterweise sind in der Stoffbahn eine Mehrzahl paralleler Kontrollfäden eingelegt, die durch einen ifechzelschalter nacheinander zeitweise fur die Messung in den Stromkreis schaltbar sind.Advantageously, there are a plurality of parallel ones in the web of material Control threads inserted, one after the other through a ifechzel switch can be switched into the circuit for the measurement.
Weitere zweckmäßige oder vorteilhafte minzelheiten der Erfindung sind den nachfolgend an Hand der #eichnung beschriebenen Ausftihrungsbeispielen zu entnehraen.Further useful or advantageous details of the invention are can be found in the exemplary embodiments described below with reference to the drawing.
In der eichnung zeigt: Fig. 1 ein Siebgewebe mit einem einzigen eingewobenen elektrisch leitenden Faden, sowie die Meßeinrichtung in schematischer Darstellung, Fig. 2 einen Schnitt durch das Gewebe der Fig. 1 in größerem Maßstab in unversehrtem Zustand, Fig. 3 einen gleichen Schnitt wie Fig. 2 in ver#chlissenem ustand des Gewebes, Fig. 4 ein Siebgewebe mit einer Mehrzahl parallel angeordneter elektrisch leitender Fäden, sowie die zugehörige Meßeinrichtung in schematischer Darstellung, Fig. 5 ein Filterfilztuch mit eingelegtem Netz aus elektrisch isolierten, leitenden Fäden, sowie die zugehörige Meßeinrichtung in schematischer Darstellung, Fig. 6 einen Schnitt durch das Filterfilztuch der Fig. 5 in größerem Maßstab in unversehrtem Zustand, Fig. 7 einen Schnitt wie fig. 6 in verschlissenem Zustand des Filt erfilztuche 5.In the drawing: Fig. 1 shows a screen fabric with a single woven in electrically conductive thread, as well as the measuring device in a schematic representation, FIG. 2 shows a section through the tissue of FIG. 1 on a larger scale in an intact condition State, FIG. 3 shows the same section as FIG. 2 in the worn state of the fabric, 4 shows a screen fabric with a plurality of electrically conductive ones arranged in parallel Threads and the associated measuring device in a schematic representation, FIG. 5 a filter felt cloth with an inlaid network of electrically isolated, conductive threads, and the associated measuring device in a schematic representation, FIG. 6 a section through the filter felt cloth of FIG. 5 on a larger scale in an undamaged state, Fig. 7 shows a section like fig. 6 in the worn condition of the felt cloth 5.
Gemäl.- Fig. 1 bis 3 ist in das eus nichtleitenden Fäden 1 bestehende Si ebg eweb e 2 ein elektrisch leitender ££ontrollfaden 3 in gleichen Abständen hin und her eingewebt. kit seinen Lenden ist der Lontrollfadn 3 in einen elektrischen Kreis eingeschaltet, der eine Stromquelle 4 und ein Amperel,leter 5 enthält. Aus dein Vergleich der Fig. 2 und 3 viird die querschnittsabnahme des Kontrollfadens 3 beim Verschleiß des Gewebes deutlich. Dieser Verschleiß wird durch einen Abfall der vom Amperemeter 5 angezeigten Stromstärke erkennbar, so daß er rechtzeitig berücksichtigt werden kann. - Anstelle eines Zeigeramperemeters kann selbstverständlich auch ein ein Schall- oder Lichtsignal ebenes Gerät verwendet werden.Gemäl.- Fig. 1 to 3 is in the eus non-conductive threads 1 existing Si ebg eweb e 2 an electrically conductive ££ ontrolling thread 3 at equal intervals woven back and forth. kit his loins is the Lontrollfadn 3 in an electric Circuit switched on, which contains a power source 4 and an amperel, leter 5. the end The comparison of FIGS. 2 and 3 shows the decrease in cross-section of the control thread 3 clearly when the fabric is worn. This wear and tear is caused by a drop the current strength displayed by the ammeter 5 can be seen, so that it is taken into account in good time can be. - Instead of a pointer ammeter, a a sound or light signal plane device can be used.
In Fig. 4 ist ein Siebgewebe mit einer Mehrzahl parallel angeordneter Kontrollfäden 3 gezeigt. Diese sind einerseits durch eine gemeinsame Leitung 6 an Masse gelegt. Andererseits sind sie über einen Wechselschalter 7 nacheinander in den Stromkreis, die Stromquelle 4 und des Amperemeters 5 ebenfalls an Masse gelegt.In Fig. 4 is a screen fabric with a plurality of parallel arranged Control threads 3 shown. These are on the one hand through a common line 6 Ground. On the other hand, they are in succession via a changeover switch 7 the circuit, the power source 4 and the ammeter 5 are also connected to ground.
Der Wechselschalter 7 kann von Hand betätigt werden. Er kann aber auch durch einen Synchronmotor oder durch ein Uhrwerk angetrieben werden, um die Kontrollmessungen in gleichmäßigen Intervallen nacheinander für die einzelnen von den Kontrollfäden aberwachten Bereiche des Siebgewebes zu wiederholen.The changeover switch 7 can be operated by hand. But he can can also be driven by a synchronous motor or by a clockwork to the Control measurements at regular intervals one after the other for each of Repeat the control threads but monitored areas of the sieve fabric.
Als vorteilhafte Nebenwirkung der vorbeschriebenen Ausführung ergibt sich, daß durch die an Masse gelegten Kontrollfäden die statische Aufladung des Siebgewebes in während des Betriebs abgeführt wird.As an advantageous side effect of the above-described embodiment results that the static charge of the Screen mesh is discharged in during operation.
Gemäß Fig. 5 ist in ein Filterfilztuch 8 ein Netz aus elektrisch isolierten Kontrollfäden 9 eingelegt. Auch sie sind einerseits an Masse angeschlossen, andererseits durch einen Wechselschalter 7 an den Meßstromkreis 4, 5 anschließbar.According to FIG. 5, a network of electrically insulated filters is in a filter felt cloth 8 Control threads 9 inserted. They are also connected to ground on the one hand, and on the other Can be connected to the measuring circuit 4, 5 by a changeover switch 7.
Auch hier läßt der Vergleich zwischen den Fig. 6 und 7 die verschleißbedingte Querschnittsverringerung der Kontrollfäden 9 erkennen. Ferner zeigt ilig. 7, daß die gegenseitige Isolierung 10 der.sich kreuzenden Kontrollfäden 9 durch dcn Verschleiß nicht beeinträchtigt wird.Here, too, the comparison between FIGS. 6 and 7 leaves the wear-related one Recognize the cross-sectional reduction of the control threads 9. Furthermore shows ilig. 7 that the mutual isolation 10 of the crossing control threads 9 due to wear is not affected.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2443548A DE2443548A1 (en) | 1974-09-11 | 1974-09-11 | Screen cloth wear monitor - by incorporating electrically conductive threads which form part of resistance measuring circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2443548A DE2443548A1 (en) | 1974-09-11 | 1974-09-11 | Screen cloth wear monitor - by incorporating electrically conductive threads which form part of resistance measuring circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2443548A1 true DE2443548A1 (en) | 1976-03-25 |
Family
ID=5925487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2443548A Pending DE2443548A1 (en) | 1974-09-11 | 1974-09-11 | Screen cloth wear monitor - by incorporating electrically conductive threads which form part of resistance measuring circuit |
Country Status (1)
Country | Link |
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DE (1) | DE2443548A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0402657A2 (en) * | 1989-06-06 | 1990-12-19 | Knecht Filterwerke Gmbh | Electrically conductive filter |
DE4324066A1 (en) * | 1993-07-17 | 1995-01-19 | Reimelt Dietrich Kg | Screening device |
DE19518358C1 (en) * | 1995-05-19 | 1996-12-19 | Reimelt Dietrich Kg | Filter for production process involving powdered material |
WO2006043423A1 (en) * | 2004-10-18 | 2006-04-27 | Tsukasa Industry Co., Ltd. | Sieve, shifter, and sieve breakage detector |
DE102008042916A1 (en) | 2007-12-10 | 2009-06-18 | Bühler AG | Screening machine for separating floury products or for cleaning bran, has flat or round screen, which comprises screen fabric made of plastic fiber, where screen fabric is provided partially with metallic layer made of silver or titanium |
WO2010043712A1 (en) * | 2008-10-16 | 2010-04-22 | Bühler AG | Screening machine |
WO2010054805A2 (en) | 2008-11-13 | 2010-05-20 | Sefar Ag | Fabric, device having fabric and production method for fabric |
DE102009033510A1 (en) | 2008-11-13 | 2010-05-20 | Sefar Ag | Fabric woven from synthetic fibers, e.g. useful as an electromagnetic screening, sieve or screen printing material or a sensor, electrode or conductor component, has at least one side partially coated with metal |
WO2011115508A1 (en) * | 2010-03-19 | 2011-09-22 | Optipro As | Method and apparatus for monitoring wear of and repairing shaker screens |
GB2588961A (en) * | 2019-11-15 | 2021-05-19 | Russel Finex | Method and sieve system for screening material |
DE112018005178B4 (en) | 2017-10-31 | 2022-03-17 | Flsmidth A/S | Filter plate for a filter press and grid for a filter plate |
-
1974
- 1974-09-11 DE DE2443548A patent/DE2443548A1/en active Pending
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0402657A2 (en) * | 1989-06-06 | 1990-12-19 | Knecht Filterwerke Gmbh | Electrically conductive filter |
EP0402657A3 (en) * | 1989-06-06 | 1990-12-27 | Knecht Filterwerke Gmbh | Electrically conductive filter. |
DE4324066A1 (en) * | 1993-07-17 | 1995-01-19 | Reimelt Dietrich Kg | Screening device |
WO1995002466A1 (en) * | 1993-07-17 | 1995-01-26 | Dietrich Reimelt Kg | Screening device |
US5996807A (en) * | 1993-07-17 | 1999-12-07 | Dietrich Reimelt Kg | Screening device |
DE19518358C1 (en) * | 1995-05-19 | 1996-12-19 | Reimelt Dietrich Kg | Filter for production process involving powdered material |
JP4809775B2 (en) * | 2004-10-18 | 2011-11-09 | ツカサ工業株式会社 | Sieve, shifter, and sheave break detector |
WO2006043423A1 (en) * | 2004-10-18 | 2006-04-27 | Tsukasa Industry Co., Ltd. | Sieve, shifter, and sieve breakage detector |
DE102008042916A1 (en) | 2007-12-10 | 2009-06-18 | Bühler AG | Screening machine for separating floury products or for cleaning bran, has flat or round screen, which comprises screen fabric made of plastic fiber, where screen fabric is provided partially with metallic layer made of silver or titanium |
US8607988B2 (en) | 2007-12-10 | 2013-12-17 | Bühler AG | Screening machine |
WO2010043712A1 (en) * | 2008-10-16 | 2010-04-22 | Bühler AG | Screening machine |
WO2010054805A2 (en) | 2008-11-13 | 2010-05-20 | Sefar Ag | Fabric, device having fabric and production method for fabric |
DE102009033510A1 (en) | 2008-11-13 | 2010-05-20 | Sefar Ag | Fabric woven from synthetic fibers, e.g. useful as an electromagnetic screening, sieve or screen printing material or a sensor, electrode or conductor component, has at least one side partially coated with metal |
WO2011115508A1 (en) * | 2010-03-19 | 2011-09-22 | Optipro As | Method and apparatus for monitoring wear of and repairing shaker screens |
US9498796B2 (en) | 2010-03-19 | 2016-11-22 | Optipro As | Method and apparatus for monitoring wear of and repairing shaker screens |
EA025920B1 (en) * | 2010-03-19 | 2017-02-28 | Оптипро Ас | Method and apparatus for monitoring wear of and repairing shaker screens |
DE112018005178B4 (en) | 2017-10-31 | 2022-03-17 | Flsmidth A/S | Filter plate for a filter press and grid for a filter plate |
GB2588961A (en) * | 2019-11-15 | 2021-05-19 | Russel Finex | Method and sieve system for screening material |
GB2588961B (en) * | 2019-11-15 | 2022-07-13 | Russel Finex | Method and sieve system for screening material |
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