Rip Detection
Hi Roland,
CBM has developed a laser enabled rip detection unit and may be exactly what you are looking for.
Please email me the specs of the belt and if you have any photos of the construction of the conveyor system and I can put it to our department. If you have details of what is conveyed would be helpful.
Details of the width of belt and the troughing angle at the shoot.
Regards
Michael Murace
CBM Conveyor Belt Monitoring
Australia
+61 2 9979 6644 ■
Belt Rip Detection
Hello Michael,
thanks for your interest, but it was not my intention to buy a device but to get some answers..
Regards
R.
P.S.: (Anyone else???) ■
Rip Detection By Pipe Conveyors
Dear Rolland,
I don´t believe that rip detectors are really necessary to a pipe conveyor.
I saw some equipment and up to now, I´ve never saw any rip detector applied to a pipe conveyor.
Regards
Alexandre ■
Belt Rip Detection
Merci, Alexandre, d'avoir repondu!
yes, in the final count i have exactly the same impression about what's common. So i put the fact mentioned below to the influence of some external adviser who made the client believe it was necessary.
Not a single one of all the other tube conveyor experts around here in this forum has even replied "nonsense" to this thread...
Regards
Roland ■
Sensor Loop In Pipe Conveyor Belt
Originally Posted by Roland Heilmann
yes, in the final count i have exactly the same impression about what's common. So i put the fact mentioned below to the influence of some external adviser who made the client believe it was necessary.
Not a single one of all the other tube conveyor experts around here in this forum has even replied "nonsense" to this thread...
Regards
Roland
Hi Roland,
Pipe belt , even Steel cord pipe , is possible without even any kind of tranverse reinforcement which generally unnecesssitate the application of loop, one may think. So where is the problem in embedding and applying the Rip detection system?
asok ghosh
India
asokkumarghosh@rediffmail.com ■
Sensor Loop In Pipe Conveyor Belt
Originally Posted by Roland Heilmannyes, in the final count i have exactly the same impression about what's common. So i put the fact mentioned below to the influence of some external adviser who made the client believe it was necessary.
Not a single one of all the other tube conveyor experts around here in this forum has even replied "nonsense" to this thread...
Regards
Roland
Hi Roland,
Pipe belt , even Steel cord pipe , is possible without even any kind of tranverse reinforcement which generally unnecesssitate the application of loop, one may think. So where is the problem in embedding and applying the Rip detection system?
asok ghosh
India
asokkumarghosh@rediffmail.com ■
Re: Belt Rip Detection With Tube Conveyor Belts
Hello,
The thread being already revived in December 2014, I am adding some information as below.
The pipe conveyor belt rip detection device (BRD) will be as per design and experimentation of belt manufacturers when being part of the belt, but we can certainly have views concerning application and probable solution.
Firstly, it is necessary to think why / how belt should rip (slit). It seems the pipe conveyor belt can slit mostly at 3 places as below:
- Stray crowbar / rod / plate piece has come along with bulk material at feeding zone of pipe conveyor. Such item can get stuck at junction of feed chute and skirt board, etc. and can cause belt rip.
- Now pipe conveyor feed zone is just trough belt conveyor. Let there be regular trough belt conveyor zone for about 20 m length (immediately after skirt board), and one can have usual BRD for trough belt zone (if it is feasible in belt for pipe conveyor). This can stop conveyor and avoid extension of rip.
- The belt can also rip / slit if the rod / crowbar metal piece has safely passed the trough zone, but it is longer than the pipe diameter and somehow (by misfortune) becomes perpendicular to pipe conveyor axis and thereby can cause belt rip / slit. Then there needs to be one BRD acting on tubular shape, at say 40 to 50 m from tube formation. The belt manufacturer are the right people to construct suitable device when it is part of the belt. One probable solution for this could be as below, external to belt.
4 electronic camera (like CCTV) at 45 degree disposition can record belt view radially or skew along belt. The connected computer / electronic system can generate belt circular profile (suitable for purpose) and can tally it with the reference profile. If it shows double overlap or remarkable deviation from regular shape, for some duration, then same can be interpreted as unacceptable situation and initiate stoppage of conveyor; for manual check at that location. Such device should be installed in curved zone (created or available) in pipe conveyor.
- The pipe conveyor also becomes trough belt conveyor prior to head end. If something objectionable has come / fallen on the belt by mistake (during running / maintenance); then it can get stuck-up between discharge pulley and spout wall, and can cause slit. Its spread can be prevented by installing regular BRD in return zone, prior to the formation of the belt into pipe / tube.
- As for the major length of pipe conveyor (between ends), I think nothing can go wrong because belt is already in tubular form and external thing cannot enter into it, and one need not to have BRD; unless one prefers more of them.
Ishwar G. Mulani
Author of Book: ‘Engineering Science And Application Design For Belt Conveyors’. Conveyor design basis ISO (thereby book is helpful to design conveyors as per national standards of most of the countries across world). New print Nov., 2012.
Author of Book: ‘Belt Feeder Design And Hopper Bin Silo’
Advisor / Consultant for Bulk Material Handling System & Issues.
Pune, India. Tel.: 0091 (0)20 25871916
Email: conveyor.ishwar.mulani@gmail.com
Website: www.conveyor.ishwarmulani.com ■
Belt Rip @ Tube Bc
Dear Mr. Mulani,
thank you very much for your kind consideration and insight transmitted.
As per some operational experience, with tube bc i encountered a new type of belt rip, pls. refer attached pictures. As / if the operational environment, the belt loading conditions and the conveyor routing are very demanding i encountered part time rotation of the closed tube. This then led to wedging of the belt edges into nooks at the frames and subsequently to ripping damage near the belt edge.
Utmost care must be given in design to identify areas of the belt route with risk of rotation, and if possible the frames / roller supports should give a means to adapt their position. However, often the external influences give opposing effects. I have not yet found THE technical solution to remedy such situation if it occurs in the finished plant conveyor.
Kind regards
R.
Attachment 44122 Attachment 44123 ■
Re: Belt Rip Detection With Tube Conveyor Belts
Hi Roland,
If the customer insists and given the configuration of pipe conveyors a simple tilt tray type rip detector would work well. Inexpensive easy to install and maintain
Cheers
Colin Benjamin
Gulf Conveyor Systems Pty Ltd
www.conveyorsystemstechnology.com ■
Going For The Roots
Hello Colin,
thanks for your caring. The detection of the rip so very near the edge seems to pose the problem. I did not yet see / could find the system you mentioned, so if you pls. could point me a bit more towards your source?
However, it's the root cause & the remedy to it that is on my (pers.) agenda. Larry Nordell has given such a lot of input about rotation stable special belt constructions, and also there are (?) tube conveyor design applications which should consider rotation / rotation prevention. But then there's always the finished plant, the true operational environment & operations ... and then it happens.. I'd say nevertheless.
If one could identify the areas of risk and if there would be an inbuild adaptability of / roller position / frame orientation / ...
Regards
R. ■
Re: Belt Rip Detection With Tube Conveyor Belts
Hi Roland,
The shape of a pipe conveyor is why I suggested a tilt tray. Firstly once the belt has assumed the pipe configuration just after the loading point there is virtually no chance of spillage that would create a false signal. Further the configuration of the pipe is such that any rip in the belt would see the ore fall through the ripped section as it will not hold its shape as more conventional troughed belts sometimes do. The design of a tilt tray rip detection is simple, it relies on a balanced tray being unbalanced by any ore that falls on it and through this tilting action it triggers a limit switch that stops the belt and sends an alarm. The very nature of what I have described makes it a very simple thing to design and build but I cannot point you to anyone who sells these as I have never tried to purchase one. I think from what I have just described you can also see it is not an expensive system and while I agree with others rip detection seems hard to justify this is an easy and reliable way to satisfy his concerns and requests without burdening the budget
Cheers
Colin Benjamin
Gulf Conveyor Systems Pty Ltd
www.conveyorsystemstechnology.com ■
Belt Rip Detection with Tube Conveyor Belts
Dear tube conveyor (belt) experts,
the field of conveyor belts is not my home ground, nevertheless i met the following matter:
For a ST 2500 8T / 7S roll-in tube conveyor belt the customer demanded a belt rip detection system, but without giving an explanation why he would like to have that. Commonly it was said from outside source, that for this ST - belt with textile & steel cord cross weaving a belt - rip detection system (conductor loop system) would not be applicable/useful. In case of related rip damaging the steel cord cross weave will lead to a damage pattern that a rip detection system could not prevent.
Could someone please give me some background as to: Is there after all maybe another reason why to implement b-r-d, or have there been incidents that could require b-r-d from another point of view as mentioned above?
Thank you for taking an interest
Best regards
R. ■