GB2152218A - Device for magnetic inspection of the belts of belt conveyors - Google Patents

Device for magnetic inspection of the belts of belt conveyors Download PDF

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Publication number
GB2152218A
GB2152218A GB08432647A GB8432647A GB2152218A GB 2152218 A GB2152218 A GB 2152218A GB 08432647 A GB08432647 A GB 08432647A GB 8432647 A GB8432647 A GB 8432647A GB 2152218 A GB2152218 A GB 2152218A
Authority
GB
United Kingdom
Prior art keywords
belt
head
components
belts
inspection
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.)
Granted
Application number
GB08432647A
Other versions
GB8432647D0 (en
GB2152218B (en
Inventor
Jozef Hansel
Tadeusz Kawecki
Jerzy Kwasniewski
Leslaw Lankosz
Andrzej Tytko
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.)
Akademia Gomiczo Hutnicza
Original Assignee
Akademia Gomiczo Hutnicza
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 Akademia Gomiczo Hutnicza filed Critical Akademia Gomiczo Hutnicza
Publication of GB8432647D0 publication Critical patent/GB8432647D0/en
Publication of GB2152218A publication Critical patent/GB2152218A/en
Application granted granted Critical
Publication of GB2152218B publication Critical patent/GB2152218B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9013—Arrangements for scanning
    • G01N27/9026—Arrangements for scanning by moving the material

Abstract

A device for magnetic inspection of the belts (15) of belt conveyors has the load-bearing structure (3) supporting guides (2) of adjustable spacing upon which rest two components (1) of the head mounted independently of each other. Two arbitrary outer lateral surfaces of the components (1) of the head support elastically rolls for resilient engagement with the belt and the top outer surface supports interlocking mechanisms (5) slidably engaging the guides 2. Thus by positioning the components (1) at selected positions along the guides, the length of the belt (15) may be inspected along lines spaced apart across its width. <IMAGE>

Description

SPECIFICATION Device for magnetic inspection of the belts of belt conveyors The invention relates to a device for magnetic inspection of the belts of belt conveyors equipped with steel lines.
Until now there are no devices for magnetic inspection of the belts of belt conveyors equipped with steel lines. Inspection is carried on only visually and with the aid of X-rays.
The weakness of the described inspection is that it is impossible to include the whole length of belt and its full section. Moreover inspection with X rays is a serious health hazard.
Head for magnetic inspection of steel-rubber cables, known from the Polish Patent No 1 22500, has a body consisting of two components symmetrical in relation to the plane running across the axis of the inspected cable and joined with an articulation, the distance between these parts being variable. At the ends of the body, in its interior, there are slidable vertical rolls attached to the bottom part and sets of vertical rollers with chased grooves attached to the top and bottom part.
The rolls and rollers are equipped with the arrangements for adjusting the pressing force.
The distance between rolls and rollers is being changed depending on the dimensions of steel-rubber cable. Near horizontal rollers, there are several permanent magnets mounted on the keepers, the magnets being arranged in rows, under flat pole shoes. The keepers made of ferromagnetic material support guides made of non-magnetic material upon which rest slidable sets of flat sensors. The sensors consist of U-shaped external magnetic circuits, connected with the cores with windings.
Because of its construction, the described head is suitable for inspecting cables but cannot be used for inspecting the belts of belt conveyors.
The purpose of the invention is to construct a device that enables magnetic inspection of the belts of belt conveyors at their full width.
According to the invention, the essence of the device consists in that the load-bearing structure supports guides of adjustable spacing upon which rest two components of the head mounted independently of each other.
Two arbitary outer lateral surfaces of the head support elastically rolls and the top outer surface supports interlocking mechanisms.
Owing to the application of the device, according to the invention, it is possible to magnetically inspect the belts of belt conveyors at their full width.
The subject of the invention is illustrated in the example presented in the drawing where Fig. 1 is a diagram of the device, front view, Fig. 2 - a diagram of the device, end view, Fig. 3 - a half of the device, longitudinal section, Fig. 4 - a half of the device, transverse section.
The measuring head consists of two components 1, symmetrical in relation to the plane running across the axis of the inspected cable of the conveyor and mounted independently of each other. Both components 1 of the head rest on the guides 2 of adjustable spacing depending on thickness of the inspected belt and attached to the load-bearing structure 3.
Two arbitrary outer lateral surfaces of each component I support elastically the rolls 4 and the top outer surface of components 1 supports interlocking mechanisms 5 enabling fixing the head in a given position on the guides 2. Each component 1 of the head contains several permanent magnets 6 joined with keepers 7 and arranged in rows under two sets of pole shoes 8. The keepers 7 made of ferromagnetic material support guide shoes 9 made of paramagnetic material upon which rest slidable sets of flat sensors 10. The sensors 10 consist of C-shaped external magnetic circuits 11 and flat internal magnetic circuits 12 connected with the cores 13 with windings 14 thereon.
In order to inspect the belt 15 of a belt conveyor the measuring head is placed at the terminal position over the inspected belt 15.
The flat sensors 10 surround from the top and from the bottom a part of the belt 15 of a conveyor along pole shoes 8. The magnetic circuit is formed by lines 16 of the belt 15 of a conveyor, permanent magnets 6, two pairs of pole shoes 8 and keepers 7. The sections of lines between pole shoes 8 are magnetized.
At the damaged place the change of stray field strength around the line causes formation of an electric pulse in the windings of the sensor 10 situated over the damaged place.
After passing through a rectifier circuit, these pulses are recorded by a pen of defectograph.
After inspecting the whole length of the belt 15 at the first position of the head, the latter is being shifted to the next position and the belt 15 is inspected again. This procedure is repeated until the head is in its second terminal position.
1. A device for magnetic inspection of the belt conveyors, comprising a two-component head, each of the components of which contain several permanent magnets joined with keepers and arranged in rows under two pairs of pole shoes, the keepers supporting guide shoes with the sets of flat sensors, wherein said device comprises a load-bearing structure supporting adjustably spaceable guides upon which rest the two components of the head mounted independently of each other, said components having two arbitrary outer lateral surfaces elastically supporting rolls and an outer surface supporting interlocking mecha
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (2)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Device for magnetic inspection of the belts of belt conveyors The invention relates to a device for magnetic inspection of the belts of belt conveyors equipped with steel lines. Until now there are no devices for magnetic inspection of the belts of belt conveyors equipped with steel lines. Inspection is carried on only visually and with the aid of X-rays. The weakness of the described inspection is that it is impossible to include the whole length of belt and its full section. Moreover inspection with X rays is a serious health hazard. Head for magnetic inspection of steel-rubber cables, known from the Polish Patent No 1 22500, has a body consisting of two components symmetrical in relation to the plane running across the axis of the inspected cable and joined with an articulation, the distance between these parts being variable. At the ends of the body, in its interior, there are slidable vertical rolls attached to the bottom part and sets of vertical rollers with chased grooves attached to the top and bottom part. The rolls and rollers are equipped with the arrangements for adjusting the pressing force. The distance between rolls and rollers is being changed depending on the dimensions of steel-rubber cable. Near horizontal rollers, there are several permanent magnets mounted on the keepers, the magnets being arranged in rows, under flat pole shoes. The keepers made of ferromagnetic material support guides made of non-magnetic material upon which rest slidable sets of flat sensors. The sensors consist of U-shaped external magnetic circuits, connected with the cores with windings. Because of its construction, the described head is suitable for inspecting cables but cannot be used for inspecting the belts of belt conveyors. The purpose of the invention is to construct a device that enables magnetic inspection of the belts of belt conveyors at their full width. According to the invention, the essence of the device consists in that the load-bearing structure supports guides of adjustable spacing upon which rest two components of the head mounted independently of each other. Two arbitary outer lateral surfaces of the head support elastically rolls and the top outer surface supports interlocking mechanisms. Owing to the application of the device, according to the invention, it is possible to magnetically inspect the belts of belt conveyors at their full width. The subject of the invention is illustrated in the example presented in the drawing where Fig. 1 is a diagram of the device, front view, Fig. 2 - a diagram of the device, end view, Fig. 3 - a half of the device, longitudinal section, Fig. 4 - a half of the device, transverse section. The measuring head consists of two components 1, symmetrical in relation to the plane running across the axis of the inspected cable of the conveyor and mounted independently of each other. Both components 1 of the head rest on the guides 2 of adjustable spacing depending on thickness of the inspected belt and attached to the load-bearing structure 3. Two arbitrary outer lateral surfaces of each component I support elastically the rolls 4 and the top outer surface of components 1 supports interlocking mechanisms 5 enabling fixing the head in a given position on the guides 2. Each component 1 of the head contains several permanent magnets 6 joined with keepers 7 and arranged in rows under two sets of pole shoes 8. The keepers 7 made of ferromagnetic material support guide shoes 9 made of paramagnetic material upon which rest slidable sets of flat sensors 10. The sensors 10 consist of C-shaped external magnetic circuits 11 and flat internal magnetic circuits 12 connected with the cores 13 with windings 14 thereon. In order to inspect the belt 15 of a belt conveyor the measuring head is placed at the terminal position over the inspected belt 15. The flat sensors 10 surround from the top and from the bottom a part of the belt 15 of a conveyor along pole shoes 8. The magnetic circuit is formed by lines 16 of the belt 15 of a conveyor, permanent magnets 6, two pairs of pole shoes 8 and keepers 7. The sections of lines between pole shoes 8 are magnetized. At the damaged place the change of stray field strength around the line causes formation of an electric pulse in the windings of the sensor 10 situated over the damaged place. After passing through a rectifier circuit, these pulses are recorded by a pen of defectograph. After inspecting the whole length of the belt 15 at the first position of the head, the latter is being shifted to the next position and the belt 15 is inspected again. This procedure is repeated until the head is in its second terminal position. CLAIMS
1. A device for magnetic inspection of the belt conveyors, comprising a two-component head, each of the components of which contain several permanent magnets joined with keepers and arranged in rows under two pairs of pole shoes, the keepers supporting guide shoes with the sets of flat sensors, wherein said device comprises a load-bearing structure supporting adjustably spaceable guides upon which rest the two components of the head mounted independently of each other, said components having two arbitrary outer lateral surfaces elastically supporting rolls and an outer surface supporting interlocking mecha nism.
2. A device for magnetic inspection of the belts of belt conveyors, constructed and adapted to operate substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
GB08432647A 1983-12-30 1984-12-27 Device for magnetic inspection of the belts of belt conveyors Expired GB2152218B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL24550283A PL142267B1 (en) 1983-12-30 1983-12-30 Apparatus for magnetically testing conveyor belts

Publications (3)

Publication Number Publication Date
GB8432647D0 GB8432647D0 (en) 1985-02-06
GB2152218A true GB2152218A (en) 1985-07-31
GB2152218B GB2152218B (en) 1987-08-26

Family

ID=20019968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08432647A Expired GB2152218B (en) 1983-12-30 1984-12-27 Device for magnetic inspection of the belts of belt conveyors

Country Status (3)

Country Link
DE (1) DE3446667A1 (en)
GB (1) GB2152218B (en)
PL (1) PL142267B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381145A2 (en) * 1989-01-30 1990-08-08 Kabushiki Kaisha Meidensha Method and apparatus for detecting defect in elongated metal strip
DE102006006468A1 (en) * 2006-02-10 2007-08-16 Rwe Power Ag Method for monitoring and / or non-destructive testing of a transmission element and measuring arrangement for carrying out the method
CN102253115A (en) * 2011-04-25 2011-11-23 许志浩 Steel cord belt flaw detection system and detection method therewith
WO2013062428A1 (en) * 2011-10-24 2013-05-02 Akademia Górniczo-Hutnicza im. Stanisława Staszica System for continuous detection of cord defects in flat steel-plastic elevator ropes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904612A1 (en) * 1988-09-24 1990-03-29 Westfaelische Berggewerkschaft Test method and test device for steel-wire-armoured conveyor belts, especially for underground operation
CN104097917B (en) * 2013-04-12 2016-08-03 宝山钢铁股份有限公司 Rubber conveyer and the detection device of abnormal buildup thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1082758A (en) * 1963-10-03 1967-09-13 Cons Papers Inc A device for determining caliper of non-magnetic sheet material
GB1170454A (en) * 1965-12-06 1969-11-12 Cons Papers Inc Improvements in or relating to Gauge Means
GB1209935A (en) * 1966-11-08 1970-10-21 Industrial Nucleonics Corp Roll average computing method and apparatus
EP0027368A2 (en) * 1979-10-15 1981-04-22 Commonwealth Scientific And Industrial Research Organisation Method, apparatus and instrument for monitoring elongate magnetically permeable members

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1082758A (en) * 1963-10-03 1967-09-13 Cons Papers Inc A device for determining caliper of non-magnetic sheet material
GB1170454A (en) * 1965-12-06 1969-11-12 Cons Papers Inc Improvements in or relating to Gauge Means
GB1209935A (en) * 1966-11-08 1970-10-21 Industrial Nucleonics Corp Roll average computing method and apparatus
EP0027368A2 (en) * 1979-10-15 1981-04-22 Commonwealth Scientific And Industrial Research Organisation Method, apparatus and instrument for monitoring elongate magnetically permeable members

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381145A2 (en) * 1989-01-30 1990-08-08 Kabushiki Kaisha Meidensha Method and apparatus for detecting defect in elongated metal strip
EP0381145A3 (en) * 1989-01-30 1990-10-17 Kabushiki Kaisha Meidensha Method and apparatus for detecting defect in elongated metal strip
US5146163A (en) * 1989-01-30 1992-09-08 Kabushiki Kaisha Meidensha Method and apparatus having transversely offset eddy current sensors for detecting defect in elongated metal strip joined by way of welding
DE102006006468A1 (en) * 2006-02-10 2007-08-16 Rwe Power Ag Method for monitoring and / or non-destructive testing of a transmission element and measuring arrangement for carrying out the method
CN102253115A (en) * 2011-04-25 2011-11-23 许志浩 Steel cord belt flaw detection system and detection method therewith
CN102253115B (en) * 2011-04-25 2013-10-30 许志浩 Steel cord belt flaw detection system and detection method therewith
WO2013062428A1 (en) * 2011-10-24 2013-05-02 Akademia Górniczo-Hutnicza im. Stanisława Staszica System for continuous detection of cord defects in flat steel-plastic elevator ropes

Also Published As

Publication number Publication date
GB8432647D0 (en) 1985-02-06
DE3446667A1 (en) 1985-07-11
PL245502A1 (en) 1985-07-02
GB2152218B (en) 1987-08-26
PL142267B1 (en) 1987-10-31

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PCNP Patent ceased through non-payment of renewal fee