Re: Bucket Elevator Design
Re: Bucket Elevator Design
A few basic questions -
1) what are the units on your sketch, inches, feet, metres (probably not metres).
2) what is the density of the sand to be handled lb/ft3, kg/m3 etc?
3) at what rate do you want to handle the sand lb/hr, ton/hr etc? ■
Re: Bucket Elevator Design
Could the shaker be located above the silo (no transportation required)?
What about pneumatics (or capsule)?
What about a shaking into a collection hopper, discharging into a vertical screw feeder which gravity feeds into the silo (only one mechanical bit – vertical screw)?
What about a cleated belt system?
Are you sure about the dimensions (inches) = around (rounded / circa for brevity) 4 m run, 4 m lift, 4 m run?
What about a skip - if my understanding of dimension is correct maybe it could be a hand winch effort - like a brick layers lift (cheap)?
Regards,
Lyle ■
Re: Bucket Elevator Design
Originally posted by designer
A few basic questions -
1) what are the units on your sketch, inches, feet, metres (probably not metres).
2) what is the density of the sand to be handled lb/ft3, kg/m3 etc?
3) at what rate do you want to handle the sand lb/hr, ton/hr etc?
1) Units are in Inches. Sorry, I didn't realize the number of international people there are on this forum.
2) I am currently checking on that.
3) Since I don't have density I can only give you volume. We are probably looking at about 100 - 125 ft^3/hr or about 2.75 - 3.5 m^3/hr. These are estimates but that is the best I could guess with a small safety factor so we don't have to worry about overloading the conveyor. ■
Re: Bucket Elevator Design
Originally posted by Lyle Brown
Could the shaker be located above the silo (no transportation required)?
What about pneumatics (or capsule)?
What about a shaking into a collection hopper, discharging into a vertical screw feeder which gravity feeds into the silo (only one mechanical bit – vertical screw)?
What about a cleated belt system?
Are you sure about the dimensions (inches) = around (rounded / circa for brevity) 4 m run, 4 m lift, 4 m run?
What about a skip - if my understanding of dimension is correct maybe it could be a hand winch effort - like a brick layers lift (cheap)?
Regards,
Lyle
1) The bottom of the silo has to be about 5 feet from the ground so we can get our mixers under it.
2) The shaker could probably be made to discharge into a vertical screw of some kind. The only thing I was worried about with a screw is how well do screws lift fine grains like sand?
3) With a cleated belt system wouldn't sand slide off the sides of the cleats as it is being conveyed up to the silo and potentially over peoples heads?
4) I am not sure what a skip is but I will look into a brick layers.
Anyone have any estimates on what something like I drew would cost? Am I getting way over my head with this project?
Thanks again for all your help, I really appreciate it. ■
Re: Bucket Elevator Design
Originally posted by tkoden
4) I am not sure what a skip is but I will look into a brick layers.
Re: Bucket Elevator Design
Since sand is, IMO, very abrasive then I'd try to keep things simple.
Have your shaking table mounted over a hopper that feeds down onto a troughed belt conveyor, keeping the feed into the centre of the belt.
Discharge from the belt conveyor into the bucket of a skip hoist.
Discharge the skip into your bin.
Just remember that you will have to stop the belt when the skip is raised (or you'll get a pile on the floor) and move the belt conveyor back (or the skip will hit it). Maybe mount it on rollers with an actuator to do the movement.
That's the way to do it!
Or at least one of dozens of ways :-)) ■
Re: Bucket Elevator Design
Designer,
Thank you for that link. I will defiantly look into that as an option since it looks a lot less expensive then any kind of bucket system and will probably be sufficient for our low volume needs. ■
Re: Bucket Elevator Design
1) Sounds good. I still do not see a reason you cant put the table over the silo (though there may be)?
What about a hole in the ground in lieu of the elevated silo (table directly over the top)? This would introduce a number of other issues - how to clean etc.
2) Fair enough. I think there are a number of examples of screws lifting fine material (lime, soda ash, fly ash etc). Designers comments on wear are probably fair also.
3) Looks at the following, there are plenty of reasonably successful installations.
www.cambelt.com/brochures/vertical.pdf
There a number of manufactures.
What about the sandwich belt?
http://www.dossantosintl.com/Snake.htm
4) http://www.baysidehire.com.au/brickl...Elevator.shtml
There are plenty of others.
You need to select a concept first, before you can lock in a cost (though an estimated cost will one of the selection criteria).
Maybe, if your lucky, you can replace the troughed conveyor with a chute directly into the skip hoist, to do away with the conveyor. This would require head height, which you may not be able to accommodate, though would reduce CAPEX / OPEX.
Regards,
Lyle ■
Re: Bucket Elevator Design
What about the sandwich belt?
You ain't never going to afford one of those! Anyway it's not suited to your small machine with its low capacity.
Cambelt
"Nobbly" belts are difficult to clean and all have a tendency to make a mess with material that sticks to the belt and always drops off on the return where you can't reach it. They are relatively expensive and you are locked into only limited suppliers. Flat conveyor belts are cheap and widely available. ■
Re: Bucket Elevator Design
Originally posted by designer
What about the sandwich belt?
You ain't never going to afford one of those! Anyway it's not suited to your small machine with its low capacity.
Cambelt
"Nobbly" belts are difficult to clean and all have a tendency to make a mess with material that sticks to the belt and always drops off on the return where you can't reach it. They are relatively expensive and you are locked into only limited suppliers. Flat conveyor belts are cheap and widely available.
Agreed.
Need more thinking and less typing on my behalf.
Regards,
Lyle ■
Bucket Elevator Design
Except as a gift you will be hard pressed to do this project on your budget of $10,000.00.
Mr. Designer's assessment regarding our sandwich belts is practically correct but not principally. We have built units of this this size for a very reasonable price (less than $25,000.00) but because in each case they were one of, they didn't prove, financially, to be worth our while. This situation can change dramatically if a single design can be built a multiple of times (with subsequent orders directly to the shop).
Our systems are thus typically larger. You may want to try another sandwich belt system which is typically built at lower rates and profiles like yours.
Try: www.eleveyor.com .
Joe Dos Santos ■
Helping Hand
Hi Kirk,
Always glad to help young engineers. We have posted some handy information on
Sustainable Technology http://www.cospire.com/browse.aspx?id=4325
Conveyor Calculation http://www.cospire.com/browse.aspx?id=4317
Best wishes - John.rz ■
Bucket Elevator Design
First off, sorry if this is not the right forum for this. I was doing some research and stumbled upon this forum. I am a senior manufacturing engineering student at California Polytechnic University, Pomona working on a senior project / WESTEC project. My university has a basic foundry and I have agreed to help improve/upgrade it as my senior project. Currently we do not have any way to shake out castings or transport the sand back to the storage bins other then in very old wheel barrows.
So, I along with about 6 other senior engineering students we are planning on designing and building a shaker table and elevated hopper and purchase a bucket elevator system for the foundry. I threw together a basic drawing of what I am looking at. The reason for the tall vertical and long horizontal is the conveyor has to go over the top of a large doorway. Do these dimensions look feasible? Just for reference all dimensions are in inches.
We are hoping to find a company that will sell us a discounted bucket elevator or even better, a company that will donate one to us. If anyone has a company in mine I would greatly appreciate any leads. We currently have a budget of about $10,000 which is probably nowhere near the cost of a most of these units.
If anyone has any better or cheaper solutions to this problem they are very welcome. We have never dealt with anything of this magnitude and look forward to learning from the process.
Thank you for any help you can provide.
Kirk ■