Bucket elevator

2015年10月6日星期二

The Solution to Solve Blockage of Bucket Elevator

If there is blockage, please stop feeding material immediately, if serious ,please stop the machine and check the cause of blockage. Please use a shovel or special tools to clear up the blocked materials instead of hands.

1.If blockage is caused by big lump material entering into the base , please stop machine ,remove big lump materials and plugging materials.

2.If blockage is caused by insufficient tension of bucket belt, please adjust the tension after removing plugging materials.

3.If blockage is caused by large feed flow rate which exceeds the bucket elevator capacity, please adjust the control valve or use other methods to control the flow rate after removing plugging materials.

4.If blockage is caused by feed before start-up, please remove plugging materials, start up the bucket elevator again and operate in strict accordance with the rules. You can only feed the materials after non-load running is normal.

2015年9月9日星期三

Four Methods to Solve Uneven Rotating Speed of Bucket Elevator Problem

1. Base frame blockage
The reason is feeding prior to start-up, the bucket belt lacks of tension which will cause belt skid, or the inflow rate of feeding is greater than the conveying capacity (including excessive of feeding back), as well as bulk materials enter into the base frame. The methods to eliminate the problem is to shut down the machine at once, close the feeding chute, open the base frame gate plate , clear the clogged material, and start up the machine in accordance with procedures. And also adjust the tension device in order to strengthen the clean up speed of anterior materials.
2. Conveying capacity reduces
The reason is due to the skid of the drive belt or lifting belt, insufficient rotating speed of electrical motor, uneven feeding, serious feeding back, unreasonable selection of bucket design. The methods to eliminate the problem is to adjust the tension device, check electrical motor, eliminate the fault, feed evenly, identify the cause for promptly discharge of material, and select bucket design reasonably.

3. Excessive of material returning back
The reason is the linear speed of belt elevator too fast or too slow, improper design or size of drive head, material discharging in the outlet is not smooth. The methods to eliminate the problem is to adjust the rotating speed of bearing, modify the external dimensions of drive head or adjust the drip plate at the bucket gap, and unblock the outlet.
4. Casing wears seriously and large power consumption
The reason is the installation of bearing tilts, dust deposition on bearing, poor lubrication, bearing failure or elevator belt is too tight, excessive of material returning back, blockage of base frame. The methods to eliminate the problem is to readjust, clean or change the lubricating oil, replace the bearing and adjust it properly. Identify the cause for promptly discharge of material, and clear the clogged materials.

Uneven Rotating Speed of Bucket Elevator Problem

2015年9月8日星期二

Troubleshooting of hopper belt slipping

1) Bucket elevator uses the friction between the hopper belt and the head wheel drive shaft to lifting material. If the hopper belt strength is not enough the hopper belt will slip. At this time, you should shut down the machine immediately and adjust the take-up unit to tension the hopper belt. If the take-up unit can’t make the hopper belt fully tension, this shows that the take-up unit work distance is too short, you should re-adjusted it.

The better solution is: open the joint of hopper belt, adjust the take-up unit in on the tail wheel to the highest position, put the hopper belt via head of elevator, threading head wheel and tail wheel and connected tail and head well, then the hopper belt will keep the tension but not fully tension state. In this case adjustment spindle of the take-up unit work distance should not less than 50% of the whole work distance.

2) When bucket elevator is overloading, the resistance torque will be increased and make the hopper belt slipping. In this case, you should reduce the feeding material and try to feeding uniformly. If it didn’t work, then the possible reason is there is too many material piled up in the base or hopper locked by the piled up material. At this time, you should shut down the machine and begin troubleshooting process.

3) If the inner surface of head drive shaft and hopper belt is too smooth, then the friction between them will be reduced, which will caused the hopper belt slipping. In this case, you can spread a thin layer on their inner surface to increase the friction.

4) The bearing of head and tail wheel occurs inefficient rotating will increased resistance torque and result in the hopper belt slipping. At this time, you can open, wash, oiling the bearing or change the bearing.

Troubleshooting of Abnormal Noise during the Operation of Bucket Elevator

1. The base plate and chain bucket of bucket elevator collide with each other: adjust the take-up device of base in order to stretch the chain.
2. The driving shaft and driven shaft key is flabby, the sprocket is drift, chain bucket collides with casing: the position of sprocket needs to be adjusted and the key needs to be stretched.
3. The guide plate collides with chain bucket: readjust the position of guide plate.

4. There are some materials mingled in the guide plate and chain bucket: enlarge the inputs angle of material inside the base.
5. The failure bearing causes inflexible operation of bucket elevator: the bearing need to be replaced.
6. The pieces of materials or other objects stuck in the casing: stop the operation of bucket elevator and remove the materials.
7. Gear profile of sprocket (driving and driven sprocket) is abnormal: correct the gear profile of sprocket or replaced driving sprocket.
8. Gear profile of driving sprocket and chain is out of order: the sprocket gear profile needs to be corrected.
9. Drive chain idling: adjust the length of chain.
10. The casing is not installed properly: the full length of vertical alignment of casing needs to be adjusted.

2015年9月7日星期一

Maintenance of Bucket Elevator

1. CHECK BELT FOR TEARS, CUTS, ETC.

Sudden signs of unusual damage call for immediate action.

2. CHECK CUPS FOR LOOSE OR MISSING BOLTS

A loose dangling cup is the necessary lever to start a busted belt rip.

3. REPLACE BELT CUPS

Cups with a pronounced forward bend hold the belt in a vertical arc, which is a contradiction of forces. When the belt is bent in a horizontal arc around the pulleys, this will cause lengthwise cracks to appear at the bolt holes.

4. CHECK BELT TENSION

This is a possible source of drive slippage and excessive wear. Belts running loose in a leg are put to severe flex due to lack of full contact with the boot pulley. A loose belt may swing causing the cups to catch and tear the belt.

5. CHECK ALIGNMENT

Belts not running true due to out-of-plumb pulleys, idlers or casing cause edge wear and pave the way for costly accidents.

6. CHECK SLIPPAGE ON DRIVE PULLEYS

Proper lagging of pulleys can increase efficiency and belt life appreciably.

7. CHECK BUCKET ELEVATORS FOR UNEVEN LOADING

This can cause the belt to crawl across the head pulley and cause edge wear or break the belt fabric.

8. CHECK BOOT FOR WATER

A belt allowed to sit in water will rot and tear very easily.

9. CHECK DISCHARGE THROAT

The throat to the down leg should be closed as much as possible with a piece of rubber belting adjusted close to the cups. This will prevent back legging.

Maintenance of Bucket Elevator

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Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Belt conveyor, andVibrating screen, Bucket elevator, Screw conveyor, Scraper conveyor using the world's most advanced technology, we are willing to serve every company to meet your custom needs. our goal is "be the future global leader of mining machinery industry". have any questions, please contact us without any hesitation.

2015年9月6日星期日

Plate Chain Bucket Elevator

Plate chain bucket elevator is a ring chain type which adopts the model of centrifugal unloading and dig-loading. Its traction mechanism is two circular chains. In Henan Pingyuan, this series is suitable for vertical conveying of the materials with the bulk density less than 1.5 t/m³. The powdery and granular materials are easy to dig, and the small lump materials have low abrasiveness such as coal, cement, gravel, sand chemical fertilizer, grain and etc. Besides, it can convey the materials with the temperature below 250^oC. Bucket elevator is widely used in many industries for lifting powder, granular or small granular loose material according to different working conditions.

      The ore elevator machine has the advantages of big conveying capacity, high hoisting height, stable and reliable running and long life span. The plate chain bucket elevator is applicable for conveying the powder, grain and block materials, such as coal, cement, block, sand, clay and ore. The bucket elevator is allowed to convey materials with high temperature (≤ 250 degree)when armed with special circle chain structure. The maximum lifting height is 40m.

      The bucket conveyor is suitable for lifting materials from a lower position to a higher position for the materials to be continuously conveyed to upper part through the vibration plate. According to the conveying quantity, the conveying speed can be adjusted and the lifting height can also be adjusted. The elevator bucket is a continuous conveying machine that uses a series material cabin fasted on the pulling devices and vertically lifts the materials. It can be divided into plate chain bucket elevator and bucket hoist conveyor.

      Henan Pingyuan has more than 20 years of experiences in manufacturing various model of bucket elevator. We customize our products and tailor made machinery according to customer needs. Feel free to contact us at sales@pkmachinery.com

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Chain Vs Belt Bucket Elevator

The traditional chain bucket elevators are limited because of:

-       Uses heavy chain and large fabricated buckets
-       Limited number of buckets per meter
-       Maximum speed is 1.3 m/s with restrict capacity
-       Chain and sprockets wear quickly
-       High maintenance and replacement costs
-       High capacity required very large elevator construction

Advantages of Belt bucket elevator:
-       Uses 1 to 4 rows of closely spaced heavy duty seamless steel buckets
-       Designed steel cord high temperature elevator belt.
-       Capable of belt speed up to 2.3 m/s
-       Achieve far greater capabilities per case size then chain (up to double times)
-       Saves 33% of components costs
-       Much lower capital investment
-       Belt wear less than chain
-       Reduced maintenance and spares cost
-       Reduces down time and maintenance costs
-       Throughputs up to 1300 TPH and over

Belt Bucket Elevator

Henan Pingyuan Mining Machinery provides wide variety of bucket elevator. We can customize design suitable bucket elevators based on customer needs with the information of nature of materials, conveying distance, and other related technical information. Feel free to contact our sales consultant at sales@pkmachinery.com for catalogue and consultation.

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