US3834524A - Conductor loops for ascertaining damage in steel cable reinforced conveyer belts - Google Patents

Conductor loops for ascertaining damage in steel cable reinforced conveyer belts Download PDF

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Publication number
US3834524A
US3834524A US00258426A US25842672A US3834524A US 3834524 A US3834524 A US 3834524A US 00258426 A US00258426 A US 00258426A US 25842672 A US25842672 A US 25842672A US 3834524 A US3834524 A US 3834524A
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United States
Prior art keywords
conductor
loops
bridges
cables
combination
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Expired - Lifetime
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US00258426A
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English (en)
Inventor
W Ratz
W Laval
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Bergwerksverband GmbH
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Bergwerksverband GmbH
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    • 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

Definitions

  • the conductor loops in arrangements known in the art essentially comprise endless wire loops which, of any desired configuration, such a circle, rectangle or similar configuration, are spaced from each other built in the conveyer belt so that they substantially cover the whole width of the belt.
  • Such conductor loops may be built into the conveyer belt during manufacturing of the same or be subsequently attached thereto at selected distances of about 25 to 50 meters from each other.
  • the consecutive loops it is preferred to arrange the consecutive loops closer, for instance to meters from each other. In this case it is also advisable to install a greater number of transmitters and receiving devices along the conveyer belt.
  • Applicant has ascertained that in conveyer belts in which longitudinal extending steel cables are incorporated it is possible to produce conductor loops suitable for the above-mentioned purpose by connecting two transversely spaced cables by means of two conductor bridges with each other.
  • Each of the conductor loops according to the present invention is therefore constituted by a pair of conductor bridges extending transverse to the elongation of the conveyer belt between two different transversely spaced steel cables of the belt which are mechanically and electrically connected at opposite ends to the two steel cables, and the portion of the cables between the connected ends of the conductor bridges.
  • a precondition for the proper functioning of the conductor loops is that at least one of the conductor bridges of each loop is insulated from the steel cables it transverses and only electrically connected at the ends thereof to the respective two steel cables, and that adjacent conductor loops are spaced a certain minimum distance in longitudinal direction of the belt from each other.
  • the loop will still function. The proper function will be impaired only when both bridges make contact with one and the same cable they traverse. If the opposite ends of the pair of conductor bridges which form a single conductor loop are respectively connected to the same steel cables, then the minimum distance between adjacent loops should be about 8 meters, whereas when the opposite ends of the pair of conductor bridges forming each loop are respectively connected to different steel cables, then the minimum distance between adjacent conductor loops may be reduced to about 3 or 4 meters.
  • a distance of about 10 to centimeters between the pair of conductor bridges forming an individual conductor loop has been proven suitable, whereby the conductor bridges need not necessarily extend parallel to each other. While generally the conductor loops will have a substantially rectangular configuration, it is also possible in order to reduce the connecting points between the conductor bridges and the steel cables to form each conductor loop in the form of a triangle.
  • the conductor bridges may be connected at the opposite ends thereof by clamping members or by plaiting or entwining to the respective steel cables of the conveyer belt. Evidently, it is also possible to connect the ends of the conductor bridges by soldering or welding to the steel cables.
  • the steel cables of the conveyer belt are imbedded in rubber or similar insulating material, then it is possible to use for the conductor bridges bare wires, or wires insulated in the manner as above described. If the con ductor loops have to be provided in the conveyer belts after the latter have been finished, it is sufficient to cut into the upper cover layer of the belt appropriate grooves into which the conductor bridges are then imbedded. Care has to be taken that the blank ends of the conductor bridges and the blank portions of the steel cables to which the ends of the conductor bridges have to be connected, are again properly insulated after the connection has been made, for instance by a mass of rubber or similar insulating material, to protect the connection against mechanical damage or corrosion.
  • connection it is advantageous to surround the connection with conductive rubber.
  • FIG. 1 is a partial schematic plan view of a conveyer belt provided with conductor loops and FIG. 1 schematically indicates also a transmitter and a receiving device adjacent the conveyer belt, while for reason of clarification the upper cover layer of the conveyer belt is removed in FIG. 1 and in the other Figures;
  • FIG. 2 is a partial plan view of a conveyer belt showing a modified conductor loop arrangement
  • FIG. 3 is a partial plan view of a conveyer belt showing a further modification of a conductor loop
  • FIG. 4 is a partial plan view of a conveyer belt showing an additional modification of a conductor loop
  • FIG. 5 is a partial plan view of a conveyer belt showing another modification of a conductor loop
  • FIG. 6 is a partial plan view of a conveyer belt showing yet another modification of a conductor loop
  • FIG. 7 is a partial enlarged plan view showing the connection of one end of a conductor bridge to one of the steel cables of the conveyer belt;
  • FIG. 8 is a view similar to FIG. 7 and showing a different kind of connection.
  • FIG. 9 is a view similar to FIG. 8 and showing another kind of connection.
  • FIG. 1 partially illustrates in a schematic manner a conveyer belt according to the present invention which is provided with a plurality of conductor loops, only two of which L and L are shown in this Figure.
  • the conveyer belt 1 comprises a plurality of steel cables only the outermost of which are referred to with the reference numerals 3-6. These cables extend substantially parallel to each other in longitudinal direction of the conveyer belt and are imbedded in a mass of insulating material, such as rubber or the like, and for clarification reason the upper cover layer of the belt is removed in FIG. 1.
  • Each of the conductor loops L and L comprises a pair of conductor bridges 2 which are respectively connected at the right ends thereof, as viewed in FIG.
  • the conductor bridges forming the adjacent conductor loop L are connected at the opposite ends respectively to the same cables 3 and 4.
  • the minimum distance d between adjacent conductor loops has to be 8 meters. It is mentioned that FIG. 1 is not drawn to scale since the distance d, in actuality is much greater than the width of the conveyer belt.
  • the conductor bridges 2 are shown as extending substantially parallel to each other and substantially normal to the longitudinal direction of the cables and the distance between the two bridges at each loop is preferably between 10 to centimeters.
  • FIG. 1 also schematically indicates a transmitter T located adjacent the conveyer belt for transmitting high frequency radiation to the conductor loops and a likewise stationary receiver R adjacent the conveyer belt adapted to receive in a known manner signals from the conductor loops, which signals are modified whenever any of the conductor loops is damaged due to tearing of the conveyer belt so that the conveyer belt may be instantly stopped if such damage occurs to prevent increase of such damage. Stopping of the conveyer may be initiated by an operator observing the modified signal or the modified signal may act on an appropriate electronic device which in turn stops the conveyer belt drive.
  • FIG. 2 shows a slight modification of the arrangement of the conductor loop.
  • the conductor loop L shown in FIG. 2 is identical in construction and arrangement with the conductor loop L shown in FIG. 1, however, the adjacent conductor loop L differs slightly from the conductor loop L in that the two conductor bridges 2' are connected at their right ends, as viewed in FIG. 2, not to the cable 3, but at the points 2d and 2e to the cable 6 adjacent thereto, whereas the left ends of the two conductor bridges are connected at the points 2g and 2f to the cable 5 adjacent to the cable 4.
  • the distance d between adjacent loops may be reduced as compared to the distance (1, shown in FIG.
  • the minimum distance in the arrangement shown in FIG. 2 may be between 3 and 4 meters so that damage occurring by longitudinal slits in the conveyer belt may be ascertained already in extremely short time. While the conductor loop L shown in FIG. 2 has the disadvantage that damage occurring in the marginal portions of the conveyer belt outside of the cable 5 and 6 will not be indicated, such disadvantage seems negligible since longitudinal tearing in the outer marginal portion of the belt occurs very rarely.
  • FIG. 3 illustrates a modified arrangement in which two shorter conductor loops L and L are provided which are transversely offset with respect to each other to guard especially the center portion of the conveyer belt in which damage is most likely to occur.
  • FIG. 4 illustrates another modification of a conductor loop.
  • the conductor loop L shown in FIG. 4 is shown in FIG. 4,
  • FIG. 5 shows a further modified conductor loop L in which the conductor bridges 2" are offset between the opposite ends thereof so that each of the conductor bridges has a zig-zag configuration.
  • the two conductor bridges are connected at the right ends thereof, as viewed in FIG. 5, respectively at the points 21 and 2m to the cable 3, whereas their offset left ends are connected at the points and 2p at the cable 4.
  • FIG. 6 shows a still further modification of a conductor loop L which is constructed to facilitate repair of the same when one of the conductor bridges is damaged.
  • One of the conductor bridges 2"" is connected at opposite ends at the points 2q and Zr to the steel cables 3 and 4, whereas the other conductor bridge comprises two transverse portions offset in longitudinal direction of the conveyer belt, one of which is connected at the points 2s and 2t to the steel cables 4 and 7 and the other of which is connected at the points 2n and 2v to the cables 7 and 3, and a connecting portion between the points 22 and 214 formed by the cable 7. If only one of the transverse portion is destroyed it can be easily replaced.
  • FIG. 7 illustrates at an enlarged scale the connection of the blank end of one of the conductor bridges 2 to a cable, for instance the cable 3 by means of a clamping member 7 of any known construction
  • FIG. 8 schematically illustrates another connection in which the blank end of the conductor bridge 2 is connected for instance to the cable 3 by a spiral or braiding arrangement 8.
  • at least one of the conductor bridges has to be insulated from the cables it traverses and the blank end portions of the conductor bridges as well as the blank portions of the cable to which they are connected have to be properly insulated again after the connection has been made.
  • FIG. 9 illustrates a connection in which the blank end 8 of the conductor bridge 2 wound about the cable 3 is surrounded with a mass of conducting rubber 10.
  • a combination comprising a conveyor belt having longitudinally extending and transversely spaced steel cables embedded in insulating material; a plurality of closed conductor loops arranged spaced from each other in longitudinal direction of said belt, each of said conductor loops comprising a pair of conductor bridges extending transverse to the elongation of said conveyor belt and spaced from each other in the longitudinal direction of said belt between two transversely spaced steel cables and being at opposite ends mechanically and electrically connected to said transversely spaced steel cables to form with portions of said cables between said connected ends said closed conductor loops; and stationary transmitter and receiver means adjacent said belts and operative to provide a signal upon destruction of any of said conductor loops.

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  • Control Of Conveyors (AREA)
  • Belt Conveyors (AREA)
  • Ropes Or Cables (AREA)
US00258426A 1971-07-21 1972-05-31 Conductor loops for ascertaining damage in steel cable reinforced conveyer belts Expired - Lifetime US3834524A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2136347A DE2136347C3 (de) 1971-07-21 1971-07-21 Leiterschleifen für die Überwachung von Stahlseilförderbändern

Publications (1)

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US3834524A true US3834524A (en) 1974-09-10

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US00258426A Expired - Lifetime US3834524A (en) 1971-07-21 1972-05-31 Conductor loops for ascertaining damage in steel cable reinforced conveyer belts

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Country Link
US (1) US3834524A (enrdf_load_stackoverflow)
JP (1) JPS5233869B1 (enrdf_load_stackoverflow)
AT (1) AT329436B (enrdf_load_stackoverflow)
BE (1) BE784456A (enrdf_load_stackoverflow)
CA (1) CA952210A (enrdf_load_stackoverflow)
CH (1) CH541493A (enrdf_load_stackoverflow)
DE (1) DE2136347C3 (enrdf_load_stackoverflow)
FR (1) FR2146366B1 (enrdf_load_stackoverflow)
GB (1) GB1338530A (enrdf_load_stackoverflow)
IT (1) IT959089B (enrdf_load_stackoverflow)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020945A (en) * 1974-09-12 1977-05-03 Bando Chemical Industries, Ltd. Safety device for conveyor belt
US4646912A (en) * 1981-12-17 1987-03-03 The B. F. Goodrich Company Rip detector system
US5426362A (en) * 1992-09-30 1995-06-20 Ninnis; Ronald M. Damage detection apparatus and method for a conveyor belt having magnetically permeable members
US5618999A (en) * 1995-09-28 1997-04-08 The Goodyear Tire & Rubber Company Apparatus and method for monitoring condition of objects
US6015038A (en) * 1995-12-19 2000-01-18 Otis Elevator Company Handrail monitoring system
WO2000021865A1 (en) * 1998-10-15 2000-04-20 Albany International Corp. Endless belt or fabric for use in a process control loop
US6086061A (en) * 1998-08-31 2000-07-11 Multifeeder Technology, Inc. Automatic product loader for use with sheet feeders
US6127823A (en) * 1997-10-08 2000-10-03 Atherton; David L. Electromagnetic method for non-destructive testing of prestressed concrete pipes for broken prestressing wires
US6127822A (en) * 1994-01-26 2000-10-03 Honda Giken Kogyo Kabushiki Kaisha Adhesive member for forming an adhesive layer between two members and capable of detecting an internal defect in the adhesive layer
AU744174B2 (en) * 1998-07-16 2002-02-14 Contitech Transportbandsysteme Gmbh Conveyor belt with carrier tissue in which conductive loops are embedded
US6352149B1 (en) 2000-08-25 2002-03-05 The Goodyear Tire & Rubber Company Conveyor belt with microcoil springwire sensor
US20040189289A1 (en) * 2003-03-25 2004-09-30 Atherton David L. Method for testing prestressed concrete pipes
US20040262132A1 (en) * 2001-11-02 2004-12-30 Pauley Timothy Joseph Method and system for conveyor belt monitoring
US20060118394A1 (en) * 2003-09-25 2006-06-08 Wolfgang Schnell Conductor loop
US20060202684A1 (en) * 2005-02-24 2006-09-14 Brown Barry C Multi-channel conveyor belt condition monitoring
US20070102264A1 (en) * 2005-11-08 2007-05-10 Wallace Jack B Method for self-synchronizing a conveyor belt sensor system
US20080308391A1 (en) * 2005-09-01 2008-12-18 Fenner Dunlop Limited Conveyor Belt Monitoring
US20100122893A1 (en) * 2008-11-17 2010-05-20 Veyance Technologies, Inc. Conveyor belt rip detection system
AU2006200637B2 (en) * 2005-02-24 2010-06-17 Bemo Pty Ltd Multi-Channel Conveyor Belt Condition Monitoring
US20100276257A1 (en) * 2007-03-01 2010-11-04 Eckhard Polman Conveyor belt, and power supply line, deflection roll, pneumatic device, electronic device, conveyor belt, and workpiece receptacle therefor
CN101905805A (zh) * 2010-07-30 2010-12-08 上海宏力半导体制造有限公司 传动带缺陷检测装置及检测方法
CN102502207A (zh) * 2011-11-08 2012-06-20 中国矿业大学 一种带式输送机故障检测装置
US20140131176A1 (en) * 2011-07-19 2014-05-15 Contitech Transportbandsysteme Gmbh Arrangement for monitoring a conveyor system to detect damage to the conveyor belt thereof
CN108082886A (zh) * 2018-01-15 2018-05-29 洛阳威尔若普检测技术有限公司 一种钢丝绳芯传送带自动监测系统及监测方法
US9994429B1 (en) * 2017-05-15 2018-06-12 Otis Elevator Company Handrail with a built-in RBI

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61145776U (enrdf_load_stackoverflow) * 1985-03-04 1986-09-08
DE3934654A1 (de) * 1989-10-14 1991-05-23 Sondermaschinenbau Peter Suhli Auf bruch pruefbarer endlicher tragriemen und verfahren zum pruefen eines endlichen tragriemens auf bruch
DE19716612A1 (de) * 1997-04-21 1998-10-22 Raetz Walter Signalübertragungselement für den Einbau in elastomeren Fördereinrichtungen
CN102673981A (zh) * 2011-03-16 2012-09-19 宝山钢铁股份有限公司 一种输送带金属门禁系统
JP6103019B1 (ja) * 2015-11-04 2017-03-29 三菱電機ビルテクノサービス株式会社 乗客コンベア用手摺及び測定治具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602360A (en) * 1968-12-11 1971-08-31 Clouth Gummiwerke Ag Damage control arrangement for conveyor belts

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602360A (en) * 1968-12-11 1971-08-31 Clouth Gummiwerke Ag Damage control arrangement for conveyor belts

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020945A (en) * 1974-09-12 1977-05-03 Bando Chemical Industries, Ltd. Safety device for conveyor belt
US4646912A (en) * 1981-12-17 1987-03-03 The B. F. Goodrich Company Rip detector system
US5426362A (en) * 1992-09-30 1995-06-20 Ninnis; Ronald M. Damage detection apparatus and method for a conveyor belt having magnetically permeable members
US6127822A (en) * 1994-01-26 2000-10-03 Honda Giken Kogyo Kabushiki Kaisha Adhesive member for forming an adhesive layer between two members and capable of detecting an internal defect in the adhesive layer
US5618999A (en) * 1995-09-28 1997-04-08 The Goodyear Tire & Rubber Company Apparatus and method for monitoring condition of objects
US5739442A (en) * 1995-09-28 1998-04-14 The Goodyear Tire & Rubber Company Method for monitoring conditions of objects including edge detecting and travel direction reversing steps
US6015038A (en) * 1995-12-19 2000-01-18 Otis Elevator Company Handrail monitoring system
US6127823A (en) * 1997-10-08 2000-10-03 Atherton; David L. Electromagnetic method for non-destructive testing of prestressed concrete pipes for broken prestressing wires
AU744174B2 (en) * 1998-07-16 2002-02-14 Contitech Transportbandsysteme Gmbh Conveyor belt with carrier tissue in which conductive loops are embedded
US6581755B1 (en) 1998-07-16 2003-06-24 Contitech Transportbandsysteme Gmbh Conveyor belt with carrier tissue in which conductive loops are embedded
US6086061A (en) * 1998-08-31 2000-07-11 Multifeeder Technology, Inc. Automatic product loader for use with sheet feeders
US6158576A (en) * 1998-10-15 2000-12-12 Albany International Corp. Endless belt or fabric for use in process control loop
WO2000021865A1 (en) * 1998-10-15 2000-04-20 Albany International Corp. Endless belt or fabric for use in a process control loop
US6352149B1 (en) 2000-08-25 2002-03-05 The Goodyear Tire & Rubber Company Conveyor belt with microcoil springwire sensor
US20040262132A1 (en) * 2001-11-02 2004-12-30 Pauley Timothy Joseph Method and system for conveyor belt monitoring
US20040189289A1 (en) * 2003-03-25 2004-09-30 Atherton David L. Method for testing prestressed concrete pipes
US7002340B2 (en) * 2003-03-25 2006-02-21 Atherton David L Method for inspecting prestressed concrete pressure pipes based on remote field eddy current/transformer coupling and use of non-coaxial coils
US7178663B2 (en) * 2003-09-25 2007-02-20 Phoenix Conveyor Belt Systems Gmbh Conductor loop
US20060118394A1 (en) * 2003-09-25 2006-06-08 Wolfgang Schnell Conductor loop
US20060202684A1 (en) * 2005-02-24 2006-09-14 Brown Barry C Multi-channel conveyor belt condition monitoring
US7275637B2 (en) * 2005-02-24 2007-10-02 Barry Charles Brown Multi-channel conveyor belt condition monitoring
AU2006200637B2 (en) * 2005-02-24 2010-06-17 Bemo Pty Ltd Multi-Channel Conveyor Belt Condition Monitoring
US20080308391A1 (en) * 2005-09-01 2008-12-18 Fenner Dunlop Limited Conveyor Belt Monitoring
US8074789B2 (en) * 2005-09-01 2011-12-13 Fenner Dunlop Limited Conveyor belt monitoring
US20070102264A1 (en) * 2005-11-08 2007-05-10 Wallace Jack B Method for self-synchronizing a conveyor belt sensor system
US7740128B2 (en) * 2005-11-08 2010-06-22 Veyance Technologies, Inc. Method for self-synchronizing a conveyor belt sensor system
US20100276257A1 (en) * 2007-03-01 2010-11-04 Eckhard Polman Conveyor belt, and power supply line, deflection roll, pneumatic device, electronic device, conveyor belt, and workpiece receptacle therefor
US8069975B2 (en) * 2008-11-17 2011-12-06 Veyance Technologies, Inc. Conveyor belt rip detection system
US20100122893A1 (en) * 2008-11-17 2010-05-20 Veyance Technologies, Inc. Conveyor belt rip detection system
CN101905805A (zh) * 2010-07-30 2010-12-08 上海宏力半导体制造有限公司 传动带缺陷检测装置及检测方法
US20140131176A1 (en) * 2011-07-19 2014-05-15 Contitech Transportbandsysteme Gmbh Arrangement for monitoring a conveyor system to detect damage to the conveyor belt thereof
US8910777B2 (en) * 2011-07-19 2014-12-16 Contitech Transportbandsysteme Gmbh Arrangement for monitoring a conveyor system to detect damage to the conveyor belt thereof
CN102502207A (zh) * 2011-11-08 2012-06-20 中国矿业大学 一种带式输送机故障检测装置
US9994429B1 (en) * 2017-05-15 2018-06-12 Otis Elevator Company Handrail with a built-in RBI
CN108082886A (zh) * 2018-01-15 2018-05-29 洛阳威尔若普检测技术有限公司 一种钢丝绳芯传送带自动监测系统及监测方法
CN108082886B (zh) * 2018-01-15 2024-03-15 洛阳威尔若普检测技术有限公司 一种钢丝绳芯传送带自动监测系统及监测方法

Also Published As

Publication number Publication date
ATA431272A (de) 1975-07-15
DE2136347A1 (de) 1973-02-15
JPS5233869B1 (enrdf_load_stackoverflow) 1977-08-31
DE2136347C3 (de) 1974-07-11
FR2146366B1 (enrdf_load_stackoverflow) 1974-07-26
BE784456A (fr) 1972-12-06
DE2136347B2 (de) 1973-12-06
CA952210A (en) 1974-07-30
AT329436B (de) 1976-05-10
FR2146366A1 (enrdf_load_stackoverflow) 1973-03-02
IT959089B (it) 1973-11-10
GB1338530A (en) 1973-11-28
CH541493A (de) 1973-09-15

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