From the video on Youtube your concerns seem quite valid. A retrofit is shown so the system there made no allowance for wonky steel work. There are slots in the idler sets which allow alignment of the bottom rollers but there is no indication of how the large moulded skirts align themselves with the base idler assembly. If they can be bent around the curvature how are gaps between overlapping sealing flaps catered for? The equipment seems frighteningly expensive so maybe your client is not worried about the cost and just wants to try something fancy. By all means let him try but unite him more forcefully with the manufacturer so that you are covered throughout the handover period.

We know nothing about the 200t of material being conveyed so we cannot advise further. ■

Hello,

It seems your customer has asked for specific arrangement at loading point as per specific make, which looks to be patented, and if you have agreed for this, then is there any option other then to supply it ? In this situation, you will have to buy from manufacturer and use it. If your customer is open for alternative arrangement at loading point, then it is different matter.

Traditional arrangement at loading point is close pitch impact idler and also relatively close pitch usual troughing idlers below skirt board (beyond actual loading). For extraordinary ability to absorb the impact is 5 roller garland idlers with mostly rubber block at ends. I have seen such system working at Neyveli lignite mine (upto 20000 mtph) wherein excavator etc. discharges material at 4 to 5 mps of some 300 to 500 mm sized lumps from say 3 m fall height and landing onto conveyor and one can see the downward deflection of central rollers by large margin to moderate the impact effect. It is the yielding distance (deflection) which reduces the impact force.

Regards,

Ishwar G. Mulani

Author of book: Engineering Science And Application Design For Belt Conveyors

Author of book: Belt Feeder Design And Hopper Bin Silo

Advisor / Consultant for Bulk Material Handling System & Issues.

Pune, India.

Tel. no.: 0091 (0)20 2587 1916

Email: conveyor.ishwar.mulani@gmail.com

Website: www.conveyor.ishwarmulani.com ■

Originally Posted by I G Mulani

Hello,

It seems your customer has asked for specific arrangement at loading point as per specific make, which looks to be patented, and if you have agreed for this, then is there any option other then to supply it ? In this situation, you will have to buy from manufacturer and use it. If your customer is open for alternative arrangement at loading point, then it is different matter.

Traditional arrangement at loading point is close pitch impact idler and also relatively close pitch usual troughing idlers below skirt board (beyond actual loading). For extraordinary ability to absorb the impact is 5 roller garland idlers with mostly rubber block at ends. I have seen such system working at Neyveli lignite mine (upto 20000 mtph) wherein excavator etc. discharges material at 4 to 5 mps of some 300 to 500 mm sized lumps from say 3 m fall height and landing onto conveyor and one can see the downward deflection of central rollers by large margin to moderate the impact effect. It is the yielding distance (deflection) which reduces the impact force.

Regards,

Ishwar G. Mulani

Author of book: Engineering Science And Application Design For Belt Conveyors

Author of book: Belt Feeder Design And Hopper Bin Silo

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I see two problems:

1. Any convex shape such as convex radius will put high pressure on the ends of each module. This could result in high local wear, heat build-up and power loss.

2. The round tube geometry will support/contact the belt above the center roll with much higher drag friction than a wing roller. Wing roller columb drag loss is measured in approximate f= 0.005, while the Liftube f = 0.05, if you are lucky, or 10 x idler roller for wing contact.

Ask Liftube what the contact drag friction value is. Ask how they handle the convex head station trough transition against high wear and drag. My guess is they use standard idlers like it shows on their tail arrangement. First idler is standard trough. Why? Because it will lower contact drag. So, why not all as others do?

You can make a standard idler stringer that cuts cross wind emissions, keeps the ore/lime plenum chamber quasi-static so that it only transports the captured gas at belt velocity. Once ore and gas are at same speed, no more dust is liberated. We have such working systems controlling environmental emissions.

You can do same thing with pipe conveyor or its similar configurations. ■

Hi Andres

There is an internal tracking roller that can be attached to the boards on the inside of the Liftube in the event that the conveyor has tracking issues.

I have seen this is used on a 18'' belt 110m Liftube.

Regards

Larry Smith

Technical Advisor

Originally Posted by Andres Osorio

Hello Sirs,

A customer of our company is requesting us some conveyor, and requests the use the system Liftube for the support of the belting.

The conveyor is a small one, 200 TPH, 24" belt width, 15m length.

I´m not familiar with this system. The main concern that I have is regarding the belt alignment, due to the absence of lateral rolls and the impossibility to use selfalignment devices.

Can anybody give me some advice regarding the use of this system, or to share their experience using it.

Best Regards

Added by Administrator as an example:

LIFTUBE® by Standard Industrie

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