Re: Use Of Bottom Cover For Carrying Side
If the cover thicknesses are the same no reason why not do it. If you have enough room (lengthwise) install a "Belt Turnover" (google it)n and turn it over. Many common designs out there. As long as you have the room to do it you should not need to cut the belt.
You will find a few threads on them here.
https://forum.bulk-online.com/showth...Belt-Turnovers
https://forum.bulk-online.com/showthread.php?4337-Turnover-of-Belt-Conveyor ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Re: Use Of Bottom Cover For Carrying Side
There is a major problem flipping over belts and that is belt tracking due to the the uneven wear patterns on the top side. This will be a particular problem if the trough angles are quite shallow. Technically there is no issue but your operators may not like you very much
Cheers
Colin Benjamin
Gulf Conveyor Systems Pty Ltd
www.conveyorsystemstechnology.com ■
Something To Hold In Hands
Dear Mr. S. Geanesh,
How much is much damaged? Could you perhaps give some pictures to the community in order to see what to assess? But even so, the belt should be thoroughly assessed in its entirety.
If top cover is worn out, is there a reason why the rest of the belt should be in sufficiently better condition to go on? Is there perhaps a especially demanding impact area that damages the top cover beyond acceptable limits? Did you have to shorten those belts for lengthening already? Do we talk steel cable or fabric belts?
Imo, one should assess on every case, but not in general and across fields. Wear resistant belts have probably different bottom / top cover thicknesses, so the belt stretch shall change. Supporting Colin the tracking might get difficult at pulleys, some wear & tear effects from patterns of pulley lagging might arise.
Remembering some pictures of really damaged EP belts (at your plant?) & perhaps carrying coal to Newcastle, if the top cover is much damaged, what does the tension member (of a fabric belt / or even of a steel cable belt) look like if the top cover is really worn away?
I would however very much like to request you to communicate, to what conclusion you came and what are the outcomes, if you take it to a test.
Thank you in advance, Regards
R. ■
Flapjack Economics
Originally Posted by sganesh
Is it possible to flip the conveyor, with out cutting and again laying, so that bottom cover will take to the carrying side? Is there any readymade proven device available for the same?
.........
Regards,
If you have a GTU and the take up travel exceeds the belt width you can flip without cutting or creasing. You will have to thread short lengths of a slightly creased belt around the head etc, but since you are going to run the belt to destruction anyway there should be no problem there. If you are talking steel chords then be careful that they don't damage the pulleys during future life.
If you have those silly belt rip detection wires just remember to deactivate the sensors.
I like the idea of getting the money's worth out of rubber. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Re: Use Of Bottom Cover For Carrying Side
Assuming you can manage the physical change, I seem to recall this has been covered previously, though I could only find:
https://forum.bulk-online.com/showth...eel-Cord-Belts
As stated by others an appropriate assessment is required (though like most others applications, probably rarely undertaken).
Regards,
Lyle ■
Hot & More
On second thought, there`s also talk about SHR cover grade. If that is used as specified, how much spillage from mistracking or in case of belt rip you / one can safely permit? And how about the environment of the conveyors, do they allow that in every location L/R & downwards & with your staff around? How much of a tension member is left when the belt is / was in contact with hot material assuming worn away (protective) cover material?
Perhaps all that is not as grave as that, but when crawling in darkness some ( ;-) ) tend to see a bigger pit than there really is..
Regards
R. ■
Re: Use Of Bottom Cover For Carrying Side
Dear all,
Thank you very much in participating. We have permanent turn over system in one of our long conveyors.
But is there any portable turn-over systems avaialble in the market for this purpose of flipping the conveyor belt ?.
Before flipping, the device will be installed on the conveyor frames. After flipping, it will be removed and used for another conveyor.
The conveyors I have thought are all fabric belts only. Not steel cord belts.
Usually, the fabric belts are changed, after the top cover is wornout and the first or second ply is visible. Still conveyor would be running with or without patches. If the belt is flipped, we may prolong the belt's life to some extent, provided the rollers are good.
After flipping , the damaged plies will directly run on the drive and other pulleys surface. The traction and the required "grip" between those exposed plies and the drive pulley need to be analysed. Will it be as same as that of bottom cover and pulleys before flipping?
If this practice is done at other factories, the problems faced, the useful life of the belt after flipping is not known to me . And I am interested to know them.
Thanks & lots of regards to all, ■
Don't Do It
Hi there..
My advice is not to do it.
To have burden alternating on both sides of the belt, you need two top covers.
This makes the belt a little thicker and thick belts do not like flexing from flat to trough, and back again in the two transition areas.
This repeatedly creases the belt typically through 35 degrees.
If you flip the belt as well, then you repeatedly crease the belt through +35 degrees followed by -35 degrees.
Belts do not like repeatedly bending through 70 degrees. (Do that to a piece of steel, and it breaks)
Cheers
Taggart LSL Tekpro ■
Re: Use Of Bottom Cover For Carrying Side
Dear Mr.Graham Spriggs,
The belt will be used, to get the maximum life from the top cover of a fabric belt, till first and/or second ply is exposed.
After that conveyor will be removed and layed again so that bottom cover will be used for carrying the material.
( Is this can be done, without removing the belt ? ).
So there is no continous bending on both side ( +35 and - 35 ).
Hope I have made it clear now.
Regards, ■
Re: Use Of Bottom Cover For Carrying Side
In AU at least a number of splicing contractors have suitable equipment to achieve this.
Despite your desire to flip the belt, using the belt to the carcass in any configuration, is often not recommended.
Regards,
Lyle ■
Re: Use Of Bottom Cover For Carrying Side
Hi,
HR, SHR & FR top cover.....
How hot is the material you are carrying?
Is the bottom cover made out of the same material as the top cover? Probably should check with your belt supplier.
If the second ply is already showing you run a much greater risk of breaking your belt and slipping on your drive.
Best regards,
Andrew ■
Use of Bottom Cover for Carrying Side
Dear experts,
In few of our conveyors ( top cover grade : HR, SHR & FR ) , the top cover is much damaged. But the bottom cover is found relatively better. Is it possible to flip the conveyor, so that the bottom cover will be taken to the carrying side.
Is it possible to flip the conveyor, with out cutting and again laying, so that bottom cover will take to the carrying side? Is there any readymade proven device available for the same?
Requesting valuable comments please. This may be applicable for wear resistant belts also ( Please assume that all rollers & other mechanicals are in good condition ).
Regards, ■