DE3441742C2 - Conductor loops for monitoring conveyor belts at risk of slitting - Google Patents
Conductor loops for monitoring conveyor belts at risk of slittingInfo
- Publication number
- DE3441742C2 DE3441742C2 DE19843441742 DE3441742A DE3441742C2 DE 3441742 C2 DE3441742 C2 DE 3441742C2 DE 19843441742 DE19843441742 DE 19843441742 DE 3441742 A DE3441742 A DE 3441742A DE 3441742 C2 DE3441742 C2 DE 3441742C2
- Authority
- DE
- Germany
- Prior art keywords
- conductor loops
- conveyor belts
- slitting
- risk
- connections
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
Landscapes
- Ropes Or Cables (AREA)
Description
Die Erfindung betrifft Leiterschleifen aus Metalldrahtseilen mit verdrillten Litzenenden für die Überwachung von aufschlitz gefährdeten Fördergurten, wobei die Drillverbindungen anschließend mit einem leitenden Überzug versehen werden.The invention relates to conductor loops made of metal wire ropes with twisted ends for monitoring slits endangered conveyor belts, the drill connections then be provided with a conductive coating.
Die gattungsbildende DE-OS 22 46 139 schlägt vor, die Drill verbindungen so auszubilden, daß in gegenseitigen Abständen aus dem Seil herausragende, miteinander verdrillte Litzenenden zu einer Endloslitze verbunden sind. Zur Verbesserung der stoff schlüssigen Haftung in dem Gurtkörper wird die Leiterschleife nach Herstellung der Drillverbindungen mit einem Messingüberzug versehen.The generic DE-OS 22 46 139 suggests the drill train connections so that at mutual intervals protruding, twisted strand ends towards the rope an endless strand are connected. To improve the fabric conclusive adhesion in the belt body becomes the conductor loop after making the drill connections with a brass coating Mistake.
Verbindungen durch verdrillte Litzenenden haben sich jedoch nicht bewährt, da, wie Untersuchungen unter dem Elektronenmi kroskop zeigten, beim Vulkanisieren oder während des Betriebes durch den die Drillverbindung umschließenden Gummi die Kontakt stelle der entsprechenden Litze unterwandert wird, was zum Aus fall der Leiterschleife führt. Dadurch wurden Phänomene erklär lich, daß eine als defekt erkannte Leiterschleife - vergleichbar einem Wackelkontakt - nach dem Herauspräparieren aus dem Gummi gurt plötzlich wieder leitfähig war. Durch die starke Walkar beit beim Herauslösen haben sich die isolierend zwischen den verdrillten Litzen befindlichen Partikel verlagert und den me tallischen Kontakt wieder hergestellt.However, there have been connections through twisted ends not proven because, like investigations under the electron mi microscope showed, during vulcanization or during operation through the rubber surrounding the drill connection place undermines the corresponding strand, which leads to the end if the conductor loop leads. This explained phenomena Lich that a conductor loop recognized as defective - comparable a loose contact - after dissection from the rubber belt was suddenly conductive again. Through the strong walkar When detaching, they are isolating between the twisted stranded particles and the me restored contact.
Der in der DE-OS 22 46 139 zur Verbesserung der Haftung vorge schlagene Messingüberzug bietet ebenfalls keinen Schutz, da der Überzug zu dünn ist.The featured in DE-OS 22 46 139 to improve liability struck brass cover also offers no protection because the Coating is too thin.
Obwohl diese Ausgestaltung der Leiterschleifen zu guten An fangsergebnissen führt, hat sie sich in der Praxis als störan fällig gezeigt, da nach kurzer Zeit durch den Walkprozeß im Fördergurt der Überzug abgerieben und das Metall freigelegt wird. Das führt alsbald zu einer chemischen Reaktion des Metalls mit Beistoffen der Gummimischung des Fördergurtes, vorwiegend Schwefel, und einer alsbaldigen Selbstzerstörung der Leiter schleife wegen fehlender Leitfähigkeit.Although this design of the conductor loops is good results, it has proven to be unsafe in practice due due, because after a short time through the fulling process in Conveyor belt rubbed off the coating and exposed the metal becomes. This soon leads to a chemical reaction of the metal with additives of the rubber mixture of the conveyor belt, mainly Sulfur, and an immediate self-destruction of the ladder loop due to lack of conductivity.
Der Erfindung liegt die Aufgabe zugrunde, diese Nachteile zu vermeiden und eine Leiterschleife zu schaffen, die eine dau erhafte elektrische Verbindung garantiert und damit genügend leitfähig ist, um ein Signal ausreichender Stärke zu erzeugen.The object of the invention is to overcome these disadvantages avoid and create a conductor loop that lasts guaranteed electrical connection and thus sufficient is conductive to generate a signal of sufficient strength.
Diese Aufgabe wird gemäß der Erfindung durch die kennzeichnen den Merkmale des Anspruchs 1 gelöst.This object is according to the invention characterized by the solved the features of claim 1.
Die Enden der Litzen eines verzinkten Stahlseils werden in an sich bekannter Weise durch Verdrillen miteinander verbunden und die Drillverbindungen vollständig in niedrigschmelzende Metallegierungen oder leitend gemachte Kunststoffe eingebettet, um so dauerhafte und gegen äußere chemische Einflüsse resistente Verbindungen zu schaffen, die darüber hinaus nicht durch Gummi unterwandert werden können.The ends of the strands of a galvanized steel cable are in known to each other by twisting and the drill connections completely in low-melting metal alloys or embedded plastic made to so permanent and resistant to external chemical influences To create connections that are beyond rubber can be infiltrated.
Aus Gründen der Nachgiebigkeit werden die Leiterschleifen in flexibler Ausführung hergestellt. In der Praxis haben sich da her verzinkte Stahlseile geringen Durchmessers bewährt. Sie zeichnen sich durch hohe Festigkeit und chemische Resistenz aus.For reasons of flexibility, the conductor loops in manufactured in a flexible version. In practice there have been galvanized steel cables of small diameter have proven their worth. she are characterized by high strength and chemical resistance out.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigt dieAn embodiment of the invention is in the drawing shown and is described in more detail below. It shows the
Fig. 1 die Anordnung der Drillverbindungen in einem verzink ten Stahlseil. Fig. 1 shows the arrangement of the drill connections in a galvanized steel cable.
Die Fig. 1 zeigt einen Teilabschnitt der Leiterschleife, die aus einem verzinkten Stahlseil 5 besteht, das in einer bevor zugten Ausführungsform aus sieben Litzen gebildet wird. Die Drillverbindungen 1, 2 und 3 sind durch eine Ummantelung 4 geschützt, die z. B. aus Zinn besteht. Selbstverständlich wer den auch die restlichen Litzen auf die gleiche Art verbun den und geschützt, so daß sich eine Endlos-Litze ergibt. Fig. 1 shows a portion of the conductor loop, which consists of a galvanized steel cable 5 , which is formed in a preferred embodiment from seven strands. The drill connections 1 , 2 and 3 are protected by a sheath 4 , the z. B. consists of tin. Of course, who also connected and protected the remaining strands in the same way, so that there is an endless strand.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843441742 DE3441742C2 (en) | 1984-11-15 | 1984-11-15 | Conductor loops for monitoring conveyor belts at risk of slitting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843441742 DE3441742C2 (en) | 1984-11-15 | 1984-11-15 | Conductor loops for monitoring conveyor belts at risk of slitting |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3441742A1 DE3441742A1 (en) | 1986-05-15 |
DE3441742C2 true DE3441742C2 (en) | 1996-01-11 |
Family
ID=6250363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19843441742 Expired - Fee Related DE3441742C2 (en) | 1984-11-15 | 1984-11-15 | Conductor loops for monitoring conveyor belts at risk of slitting |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3441742C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19722673B4 (en) * | 1997-05-30 | 2004-08-05 | Contitech Transportbandsysteme Gmbh | Conductive loop for embedding in a belt, belt, conveyor belt |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3927746C2 (en) * | 1989-08-23 | 1999-02-11 | Raetz Walter | Installation short-circuit ring for slit monitoring on conveyor belts |
DE4013764C2 (en) * | 1990-04-28 | 1999-04-01 | Raetz Walter | Installation short-circuit rings for electronic slit monitoring on conveyor belts |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7113513U (en) * | 1971-07-22 | Phoenix Gummiwerke Ag | Spiral wire insert for steel cord conveyor belts | |
DE7023445U (en) * | 1971-02-25 | Phoenix Gummiwerke Ag | Electrical conductor loop for conveyor belts | |
DE2246139C3 (en) * | 1972-09-20 | 1978-07-20 | Continental Gummi-Werke Ag, 3000 Hannover | Electrical conductor element for monitoring slits on conveyor belts |
-
1984
- 1984-11-15 DE DE19843441742 patent/DE3441742C2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19722673B4 (en) * | 1997-05-30 | 2004-08-05 | Contitech Transportbandsysteme Gmbh | Conductive loop for embedding in a belt, belt, conveyor belt |
Also Published As
Publication number | Publication date |
---|---|
DE3441742A1 (en) | 1986-05-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: STAHLGRUBER OTTO GRUBER GMBH & CO., 85586 POING, D |
|
8339 | Ceased/non-payment of the annual fee |