I-B Conveyor

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I-B Conveyor

Internal Bucket Conveyor

The Nishimura I-B Conveyor is an innovative internal bucket conveyor with features and advantages not available in conventional outer bucket conveyors, such as extremely smooth loading, natural discharge, and the optional use of rubber bucket materials to prevent sticking. Due to its structure, the impact to buckets during loading is extremely small, so buckets wear less and have longer service lives.

Overview
Specifications
Dimension Chart

I-B stands for Internal Bucket. This vertical conveyor has its buckets attached to the inside of the belt.
Liquids and granules can be transported vertically.

I-B Conveyor

Loading in the hopper drum

As you can see in the video, the belt and buckets move together through the hopper drum.
Material to be transported is fed into the hopper drum and naturally flows into the buckets.

Reference

This I-B Conveyor has a belt width of 1200mm. It can transfer 180t/hour to the equivalent height of a nine-story building (26m.)

Model Number	IB-120A26
Belt width	1,200㎜
Shaft to Shaft Height	26ｍ
Power	30kW
Belt speed	40m/min
Transport volume 180t/h	180t/h（133m³/h）
Transported material	Ferroalloys, slag-making materials

Applications
Granulated slag	Coke	Coal
Lime	Iron powder	Glass
Ferroalloy	Wooden pellets	Refractory materials
Ceramics	Silica stone and sand	Gypsum

Structure

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I-B Conveyor	Outer bucket conveyor

Buckets are attached to the inside of the belt Material is fed into the hopper drum Material flows out of the bucket into the discharge chute when the bucket is inverted at the head pulley The belt is tensioned by the weight of the suspended hopper drum	Buckets are attached to the outside of the belt Material enters through the loading chute, collecting in the base. Buckets shovel up material for transport. This action is rough on the buckets Belt speed must be high to eject materials by centrifugal force at discharge

Loading

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Smooth loading

The materials are loaded into the center of the hopper drum which rotates together with the belt and bucket. Materials smoothly flow into the buckets without impact.

Advantages of Smooth Loading
Almost no damage to fragile materials Very little bucket wear Buckets do not fall off the belt	Power requirement is low because there is no resistance when loading buckets Less loading noise than scraping method
Almost no damage to fragile materials Very little bucket wear Buckets do not fall off the belt Power requirement is low because there is no resistance when loading buckets Less loading noise than scraping method

Discharge

Smooth, gentle discharge

As the loaded bucket approaches the head pulley, its free edges contact the sides and central shaft of the pulley, forming a closed space between it and the preceding bucket. When the preceding bucket separates from the pulley, the material is released and naturally falls into the discharge chute.

Merits of the I-B Conveyor
Low power-load There is little fluctuation in power because of the natural flow of loading and unloading.	Easy to maintain The floating hopper drum unit acts as a tension weight, lowering in position as the belt stretches, keeping tension uniform. Manual adjustment is unnecessary.
Low power-load There is little fluctuation in power because of the natural flow of loading and unloading.
Easy to maintain The floating hopper drum unit acts as a tension weight, lowering in position as the belt stretches, keeping tension uniform. Manual adjustment is unnecessary.

Where is the I-B Conveyor Used?

Materials	Applications
Ferroalloy auxiliary materials	Time lagged loading prevents mixing when transporting multiple materials. Knife-shaped objects produced by steel sheet shearing Raw materials with a high apparent specific gravity Delivered to: Blast furnace manufacturers, electric furnace manufacturers All materials loaded are fully discharged, so that a single unit can carry a variety of materials without mixing.
Coal	Wet, adherent materials which have been stored outdoors Corrosive substances containing sulfur Coal dust Delivered to: Steel manufacturers, power plants, and waste incinerator plants Optional rubber bucket material can be used to prevent adhesion.
Slag	Granulated blast furnace slag Slag and metal from municipal solid waste melting furnaces Materials with a high glass content/abrasive materials Delivered to: Waste incineration plants Gentle loading ensures a long service life, even for transport of highly abrasive materials
Casting sand, construction sand, crushed stone	Recycled casting sand containing paste Adherent materials with a high water content after washing Ceramics, limestone, and crushed stone for construction Delivered to: Ceramics manufacturers, quarries Materials roll into the bucket without being compressed, resulting in good separation and smooth discharge.
Dust from dust collectors, ferrite and other powders	Coke, iron powder, incinerator ash, etc. Small buoyant powders with low apparent specific gravity Adherent powders Delivered to: Steel Manufacturers A special hopper drum for powders enables automatic collection of suspended dust.
Food products and chemicals	Raw materials which mustn’t be contaminated Strongly acidic or alkaline materials Locations where maintenance is difficult Delivered to: Food and chemical manufacturers Because of its sealed structure, dust is not generated outside the conveyor, so the I-B Conveyor can be incorporated into clean atmosphere lines.

Differences Between I-B Conveyors and Outer Bucket Conveyors

	I-B Conveyor	Outer Bucket Conveyor
Impact at loading	Small Not effected by bulky material	Large Loading velocity is problematic for bulky material
Bucket	Materials can be thin because there is no impact. The sides contact with the wall of the pulleys, but there is no wear.	Impact requires sufficient strength and non-deformable structure Heavy wear
Adherence	Materials flow in, making them loose and easily separable from the buckets at discharge. Since the belt side of the bucket is flat, a tapper can be installed on the outside of the belt to prevent build-up of materials.	Because material is shoveled into the buckets, it can become compressed and difficult to discharge. Adherent materials build up due to the difficulty of complete discharge and a lack of removal methods.
Tensioning device	The floating lower drum section automatically adjusts tension, so manual adjustment is not necessary.	Manual adjustment is necessary on a regular basis.
Power	Power requirement is 18-30% lower because there is no scraping. Power load doesn't vary.	Power load fluctuates due to resistance when materials are scraped into the buckets. Insufficient power supply situations may occur due to sluggish bulk material.
Capacity	Filling to 100% is possible.	Buckets fill to 50-60% capacity.
Spill	Extremely small amounts which can be washed out.	Dead stock remains at the base.
Residuals	None. Possible to alternately load more than one product variety with one unit	There is always residual material at the base.
Bucket Detachment	None, thanks to the use of locking nuts and rubber fastenings.	Can occur at the moment of scraping.
Conveyor Play	Rollers adjust automatically	Adjusted by take-up.
Noise	About 50 decibels at 1 meter, the same level as an air conditioner’s outdoor unit.	Loud scraping noise.

Specifications

Main specifications

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			IB-25	IB-35	IB-45	IB-60	IB-75	IB-90	IB-105	IB-120
Belt width (㎜)			250	350	450	600	750	900	1,050	1,200
Height (m)			3～30	4～40	4～40	4～50	5～50	5～60	6～60	7～70
Capacity m³/h	Belt speed m／min	20	4.2	6.9	10.2	21.1	31.5	56.7	69.3	83.9
		25	5.2	8.7	12.8	26.4	39.4	70.8	86.7	104.9
		30	6.2	10.4	15.3	31.7	47.3	85	104	125.9
		35	7.3	12.2	17.9	37	55.2	99.2	121.4	146.9
		40	8.4	13.9	20.5	42.3	63.1	113.4	138.7	167.9
Maximum particle size (mm)			20	30	50	70	100	150	200	250
Loading and discharge chute opening (mm)			□200	□250	□300	□400	□450	□500	□550	□600

Machine height is the distance between the axles of the upper and lower pulleys. Designate in units of 10 mm.

Capacity is based on a bucket loading rate of 70%.

A pass-through belt conveyor can be substituted for the discharge chute,.

If the conveyed volume is small, the maximum allowable piece size may be adjusted upward. Contact us for details.

Conveyors are custom designed and manufactured according to customer requirements.

EXTERNAL DIMENSIONS

Standard Dimension Table

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	IB-25		IB-35		IB-45		IB-60		IB-75
W	250		350		450		600		750
A	□200		□250		□300		□400		□450
H×H	□450		□530		□630		□800		□1000
L （m）	3～15	15～25	4～15	15～25	4～15	15～25	4～15	15～25	5～15	15～25
B	1020	1170	1140	1290	1270	1420	1500	1650	1730	1880
C	650	800	700	850	750	900	900	1050	1050	1200
D	1150	1300	1300	1450	1400	1550	1600	1750	1900	2050
E	380		450		500		600		700
F	450		530		630		750		900
G	1400		1700		1700		2000		2200
K	770		920		1030		1290		1560
M	950		1120		1110		1440		1740
N	2×265		2×305		2×355		2×460		2×560
P	L75×75×9		L75×75×9		L75×75×9		L100×100×10		L100×100×10
Q	330		400		430		520		2×465
R	1030		1200		1290		1560		1850
S	22		22		22		22		27
l	2400		2400		2400		2400		2400
j1	1800		1900		2000		2200		2400
j2	1800		1900		2000		2200		2400

※You can check the table by scrolling left and right.

	IB-90		IB-105		IB-120
W	900		1050		1200
A	□500		□550		□600
H×H	□1200		□1400		□1500×1900
L （m）	5～15	15～25	6～15	15～25	8～15	15～25
B	1950	2100	2130	2280	2630	2780
C	1200	1350	1300	1450	1650	1800
D	2250	2400	2650	2800	3350	3500
E	825		950		1100
F	1050		1200		1400
G	2400		2600		2800
K	1780		2180		2360
M	2060		2300		3400
N	2×660		2×770		2×700=2100
P	L100×100×10		L130×130×12		t12
Q	2×545		2×610		3×720
R	2180		2440		3600
S	27		27		35
l	2400		2400		5000
j1	2600		2900		3600
j2	2600		2900		3200

Dimensions B and K are based on standard chute angles of 45°. The chute angle can be changed based on customer needs.

For connection of the inlet, plan for an additional stretching allowance of 200mm at B.

Subject to change for improvement.

Optional Equipment

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Belt tapper	Rubber bucket

A roller with a vibration motor can be placed on the outside of the belt at the discharge chute. The roller vibrates lightly, preventing conveyed materials from adhering to the bucket and causing them to fall directly into the discharge chute.	A change to rubber buckets is also effective for highly adherent products. At the head pulley, the rubber bucket edge touches the shaft, distorting the bucket. When the bucket separates from the pulley, it returns to its original shape and this causes all of the material to fall out.