conveyor belts specifications

http://www.dornerconveyors.com/conveyors/belt_conveyors.asp?gclid=CK6J8aWaq54CFQEhDQod-mSZmQ

http://conveyor-belts.globalspec.com/Industrial-Directory/conveyor_belt_manufacturer

http://www.directindustry.com/industrial-manufacturer/bucket-elevator-75545.html

good luck.

Perhaps it is better if you help me with the calculation.

I want to know what kind of rubber belt to buy for a bucket elevator.

Product: wheat

Capacity: 600 ton/hour

Height: 25 m

Belt speed: 3.5 m/s

Belt width: 1105 mm

Bucket model: Tapco CCHD 20x9

Bucket arrangement: spaced, double

Bucket net weight: 3.5 kg each

Bucket separation: 530 mm

Pulley diameter: 760 mm, lagged

Sorry, but I can't find the calculation procedure anywhere and my calculations keep giving me a belt of only 127 N/mm of ultimate tension rating. I find that hard to believe. It isn't even an EP 200.

There is another elevator whose belt must be replaced, same data but 45 m tall.

Ok, finally I found a method in BeltService's catalog.

http://www.beltservice.com/

However, I sill don't get the numbers right. I can't find the weight of the elevator belt as indicated in that very same catalog.

For the elevator described above I get about 821 Lbs/in of maximum tension. That falls out of the range of the catalog.

What am I doing wrong?

I looked at the site that you found. Looks good. My suggestion is that you contact them with your questions. If you look on the left side of the main page there is a link for contacting them. They are the pro's and will be much better suited to give you answers.

Hello gusso,

How you doing?

Did you find a belt and or bucket size, and what page were you looking at?

Happy Holiday BTW!

Hi babybear

I am looking at a EP 200 belt, using steel buckets of 20x9 inches. Basically I have to find out how many plies and what kind of covers to use.

www.tapcoinc.com

Hi Gusso,

Have been doing some figuring, which will probably be the same as yours?

http://www.tapcoinc.com/content/product_data conversion bucket capacity

http://www.tapcoinc.com/media/Tapco_Catalog_2009.pdf Full Catalogue

Are you getting the EP 200 Belt and 132 CC -HD Polythene buckets? Bolts quantity?

At 3.5m/s:Buckets emptied: 9.6 buckets per sec. 576 per minute. 34,560 per hour.

Buckets 132 X 3.5 Kg = 462Kg empty, (excluding the belt and fixtures).

Belt size: 50,000 mm X 1105 mm wide.

(Bucket 225mm, separator 530mm =755mm total drop.)

Total length: 50M ÷ 755mm = 132. Run in pairs.......: 66 x 2 buckets.

[_\__508__/_\__508__/_] .......

~[<30mm><[bucket]><30mm><[bucket]><30mm>]

Is this roughly what you figured?

Good luck

What I am trying to get is the thickness and number of plies of the elevator belting.

I am using this method:

http://www.beltservice.com/37.html

with the data I posted above, and I get:

1- Weight of the empty buckets on one leg:

66 * 10.75 = 709.5 lbs

2- Weight carried in the buckets:

0.337 ft3/buc * 48 lbs/ft3 = 16.176 lbs/buc

16.176 * 66 = 1067.616 lbs

3- Weight of the belting:

Trying with a EP 400/3 and taking the information from here:

http://conveyor-belt-guide.com/Engineering.html

(3.4 + 2*1.1)*1.1 = 8.23 kg/m

Belting length: 25 m

Belting weight: 206 kg = 457 lbs

4- Tension:

710 + 1068 + 457 = 2235 lbs

5- Considering the digging effect:

2235 * 1.25 = 2794 lbs = 1257 kg

6- Linear tension:

(1257 kg * 9.81 m/s2) / 1100 mm = 11.21 N/mm

Then I went to this catalog:

http://www.anacondabelting.co.uk/nbr.pdf

this one:

http://www.maxbelt.com.br/index.php?sub=conteudo&pag=pro_correiasT

and this one:

http://www.correiasmercurio.com.br/pdf/catalogo_transportadoras_port.pdf

In all the cases the selected belt seems to be the model with the lowest tensile strenght.

This is the first time I make calculations on conveyor belts, but it doesn't seem right that a bucket elevator with three times the standard capacity still uses the weakest belting.

Hi gusso,

Other than the post you sent with the details, can you confirm the belts height is 25 Metres, which means you need at least 50 M of belt, not the 25 Metres you mention?

Are you running just 66 buckets, or doubling them up side by side and using 132? If not why is the belt 1105 mm wide which is twice as wide as it needs to be for a single row of buckets?

One other point, why are you working in Lbs when the weight per bucket is quoted in Kgs?

Each bucket is 7.7 Lbs (in your way of working) or 3.5 Kg in mine

Do you agree with my weight per bucket at 3.5 Kg? If not I am looking at the wrong buckets.

You appear to have the weight per bucket as 10.75 Lbs, when the weight per bucket is 7.7Lbs, or 3.5 Kgs.

It would make things a whole lot easier if you stuck to metric or Avoirdupois but not both?

From your figuring it seems you are having just 66 buckets, so why is the belt so wide? The bucket is 508 mm or 20" if you prefer. So why is the belt over twice as wide as that, at 1105 mm? Is this the narrowest belt?

And is it a friction belt or a toothed belt?

I have not worked with any reference to the belt weight and or strength as I have not figured that out yet. I will be looking at the belting today.

Please answer my query on bucket weight.

Thanks.

The height of the elevator is 25 meters (approximate between pulleys), what means about 51 meters of belt.

The suspended weight method asks for the length of one leg/tail, that is 25 meters.

The buckets are running double, side by side, making them 132. You are right, that's one obvious mistake I made. My apologies.

The weight of each steel bucket (not the polyethilene ones I was considering first) is 10.75 lbs.

This is a friction belt.

Sorry again.

Hi gusso,

I thank you for the reply my friend!

I also thank you for the info on the steel buckets. I thought I was looking at steel but perhaps I wasn't. With regard to the belt, I have not had time to look at the belts yet because I have been in bed. I can kind of understand the theory as you mention it, but would have thought that was all about working out the weight the 'full' side of the belt is taking at any one time? But, if the pulley at top and bottom are 750mm dia, should you not add the distance round 1 full pulley (½ top and bottom) to the two lengths of 25 m belt to allow for the belt going round the pulleys? In which case the belt spec is: 50 m + 2356mm, a total of 52.356 m?

This is just a question to double check measurement for me. Or have you/should you, just add the 2*750, (Dia) to the length giving a total of 51.5 m?

Is this belt going on an old pulley system or a brand new one? Because if it was a new one, the makers would allow for that would they not?

On rethinking the total length of belt Did you see the recommendation when using nylon/plastic buckets which are supposed to be more robust as if they buckle they will spring back to shape, that they are supposed to have 1 in 6 or 1 in 10 as 'digging' buckets? Is there a particular reason for having steel buckets?

Hi babybear

I actually prefer polyethilene buckets. However, my customer wants to use steel buckets so he can keep using the old steel buckets he still has in inventory.

Yes, you are right on the length of the belt. The total length is 52.356 m after adding the diameter of a full pulley.

25 m is the length that acts as a weight and is used in the calculations of tensile strength.

Have you been sick? I hope you get ok soon.

Hi gusso,

Tapco mostly specialise in various 'plastic' materials.

I cannot see a picture of the Bucket you want on Tapco. On the chart the have they say they do one at your size but I cannot see it other than the super capacity 'digger'.

I have been looking for Metal- Stainless or carbon steel but cannot find the 'CC- HD' model at 20" x 9". Can you advise on the exact bucket?

Do you want holes or slots in the buckets for the bolts? I would suggest holes, but it depends on whether they are available in your size?

Do you want this belt for a replacement for an old one, hence the width. Or is it a completely new machine? Because, as I understand it the belt should be another 50mm wider.

Not had a chance to look at the belt, have you sorted it out yet because there is a different spec for the belt and number of buckets.

I have figured the belt with your original size of 760 mm. Yesterday I worked it out on a diameter of 750 mm. The belt is slightly longer now 52388 mm, and can take an extra 3 buckets along its length, six paired up. This will increase the output for the same speed obviously.. My figures are now: Buckets 69.388.

Check model CC-B, page 28 in the pdf of the catalog (marked as 27 in paper)

I changed from model 20x9 to 20x8 to be able to use carbon steel buckets.

This belt is a replacement for an existing elevator bucket.

Hi Gusso,

You may find this site more informative perhaps? Let me know please?

http://www.powderandbulk.com/resources/bulk_density/material_bulk_density_chart_b.htm

Good luck.

Hi Guest,

I doubt that would be of use unless it is in or near South America?

take care and good luck

PS. You should never put any phone number, address, email etc on your post in open forum. If you find it necessary then send a PM by clicking on the addressees name.

Hi gusso,

Thanks for the reply in the previous post.

The smaller size will also fit the manufacturers advice of having 2" or 50 mm either side of the conveyer buckets.

With rev to the "Website doesn't exist". It does, but the 's' was not included. The site is: www.sanghviconveyors.com

www.sanghviconveyors.com

Back to your original request............ Have you solved all your problems now?

You know the belt type, length, and bucket type and size? I assume the screws or bolts are not crucial? Or do you order new ones just in case?

Take care and good luck.

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Yes, I think I have solved the issue. It is the belt I selected before, after all.

Perhaps I just need more self-confidence. :)

Hi gusso,

Yes perhaps confidence!

So what it the spec you ended up with?

take care