Belt Damage Detectors

Posted in: , on 21. Oct. 2009 - 10:05

Dear experts,

I have read that the belts can be manufactured/retrofitted with sensor loops. Sensors will monitor the time between the sensor loops and stop the conveyor if they are not getting the feed back signal when the next sensor loop is damaged. Are these applicable for both fabric and steel cord belts ?

I request to share your experience on above.

Thanks & regards, ■

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Lyle Brown
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Re: Belt Damage Detectors

Posted on 21. Oct. 2009 - 01:00

Check these out:

http://www.coal-control.com/DWD/111...dia130467.pdf

http://www.goodyearep.com/ProductsDetail.aspx?id=1848

We understand the "loop" system is suitable for all belt types and retro fitting within reason. Retro fitting may be a bit of an ask though (imagine the conversation with the Client when you tell them your are going to "dig holes" in the covers, which they paid good money for and have tried hard to get a good life out of, to install the loops).

There are other systems out there.

Regards,

Lyle ■

Re: Belt Damage Detectors

Posted on 22. Oct. 2009 - 05:09

Hello Sganesh..

Indeed you can put loops in your conveyor belt cover to detect rips.

As they pass through a monitoring station, these loops pick up a signal from one side of the belt, and if the signal can be read on the other side of the belt through the loop, the belt/loop has not been ripped.

Normally for (highly rippable) new steelcord belts only

Hardware to monitor the loops is expensive, and you can get loop damage from flexing giving spurious annoying trips.

Best not to rip the belt in the first place (See separate thread)

Cheers

LSL Tekpro ■

Graham Spriggs

Re: Belt Damage Detectors

Posted on 22. Oct. 2009 - 07:12

Thanks a lot Mr.Lyle Brown & Mr.Graham Spriggs.

I am the end user of the steel cord belt. I agree 101% with the advice of Mr.Graham.

I do take care about receiving & discharge ends and rollers etc., Because, Prevention is better than cure.

The thread Mr.Graham Spriggs mentioned is related to Rip Protection which I had started.

I have sought advice from experts like you- how to decide the rip protection cords and their strength and specifications. Is there any relation between the rating of the belt and the rip protection cords?

Obviously higher rating of belt should have higher quality of rip protection cords. And what should be their pitch? Their diameters? Is there any standard available? I could not find any relevant data so far.

( It is like this: I ride my bike with all safety. But I should know the quality of my helmet also. )

Thanks a lot for all experts & kind regards, ■

Re: Belt Damage Detectors

Posted on 23. Oct. 2009 - 08:21

Hi Snagesh..

If you are meaning the rip protection cords, as opposed to rip detection cords, they are not that thick, and closely (+- 50mm) spaced, and endless as per a long squiggle

According to what I was told by Kleber in France, the cross cords for rip protection have to be elastic to enable troughing, but do not have to be that strong, as if you get a rip proporgating, the cords bunch up until there are enough of them to trip out the belt on overload. Apparently, if you use a rip protection carcass instead of cords, you can rip the carcass, so this is not as good.

Cheers

LSL Tekpro ■

Graham Spriggs

Re: Belt Damage Detectors

Posted on 23. Oct. 2009 - 06:55

Thanks a lot Mr.Graham Spriggs for sharing your time & knowledge

With regards,

Sganesh ■

Re: Belt Damage Detectors

Posted on 5. Dec. 2009 - 06:01
Quote Originally Posted by Graham SpriggsView Post
Hi Snagesh..

If you are meaning the rip protection cords, as opposed to rip detection cords, they are not that thick, and closely (+- 50mm) spaced, and endless as per a long squiggle

According to what I was told by Kleber in France, the cross cords for rip protection have to be elastic to enable troughing, but do not have to be that strong, as if you get a rip proporgating, the cords bunch up until there are enough of them to trip out the belt on overload. Apparently, if you use a rip protection carcass instead of cords, you can rip the carcass, so this is not as good.

Cheers

LSL Tekpro

Dear Mr.Graham,

Do the above protection cord is through out the length or at regular long distances?

Or they manufactured along the belt or after manufacturing they need to be inserted by removing the top cover and again top over is vulcanized?

Can we relate the rip protection cords with their shear strength? More shear strength means better protection.

Regards, ■