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bucket elevator air flow problems video

experiences with belt bucket elevators - accendo reliability

experiences with belt bucket elevators - accendo reliability

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troubleshooting of bucket elevator

troubleshooting of bucket elevator

Troubleshooting of Bucket Elevator The bucket elevator is a kind of mechanical equipment used for conveying materials from a lower position to a higher position. This is one of the common mining machinery used in processing industries. It is able to convey large materials size and particles such as coal, cement, sand and rocks. If the Bucket Elevator malfunctions, the source of faulty operation may frequently be found by observing the nature of the fault and applying some simple checks and remedies to correct the malfunction. The following troubleshooting table is provided for this purpose. Trouble Possible Causes Remedy Normal capacity cannot be attained 1.Material is bridging at inlet. 2.Motor not developing operational RPM. 3.Material caked on buckets. 1.Correct method of feeding to insure even feed at elevators rated capacity. 2.Correct power source problem. 3.Clean buckets. Unit stalls or plugs up 1.Belt has too much slack causing buckets to jam. 2.Motor not developing operational RPM. 3.Discharge spout or down spouting plugged. 4.Slipping drive. 1.Make adjustment at take up bolts. 2.Correct power source problem. 3.Check all spouting for foreign material, build-up, dents and turns which may impede material flow. 4.Adjust drive belts and roller chain tension. Noisy operation (i.e. buckets rattling) 1.Elevator out of plumb. 2.Belt too loose or not centered on pulleys. 3.Material caked on pulleys. 4.Damaged or loose buckets. 1.Straighten elevator and plumb. Position braces so elevator is not forced out of alignment when attached to structures which may shift with loading or unloading. 2.Take up belt at splice, re-align and tighten belt with take-up bolts. 3.Clean pulleys 4.Replace or tighten buckets. Pulley drags or does not turn Frozen bearing Lubricate or replace bearing ------------------------------------------------------------------------- Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Beltconveyor, and Vibrating screen, Bucket elevator, Screw conveyor, Scraper conveyorusing the world's most advanced technology,we are willing to serve every company to meet your custom needs. our goal is "be the futureglobal leader of mining machinery industry". have any questions, please contact us without anyhesitation.

bucket elevator basics

bucket elevator basics

If material needs to be moved vertically, chances are a bucket elevator is the ideal solution for the job. In fact, the versatility and configurability of this equipment make bucket elevators a common bulk material handling system in a number of different industries. Listed below are basic facts that highlight why bucket elevators are commonly used, with key elements to consider when choosing whether or not this equipment is the right material handling solution for a particular application.

In simple terms, bucket elevators vertically convey bulk materials. They are considered similar to conveyor belts, with the greatest difference being that bucket elevators move material using buckets attached to a rotating belt or chain. The buckets work to pick up material, move it to the desired endpoint, discharge material, and finally return to the starting point to pick up a new load.

Bucket elevator configurations are engineered based on the application, material, required horsepower, and elevator height. Configuration options include centrifugal bucket elevators and continuous bucket elevators, with both models including belt and chain options.

A centrifugal bucket elevator employs centrifugal force to throw material out of the buckets as they travel over the head pulley or sprocket. This type of bucket elevator operates at a higher speed and spaces buckets further apart versus continuous bucket elevators. The result of the high speed and bucket spacing is optimized material fill and reduced interference between buckets.

Continuous bucket elevators operate at a low speed with closely spaced buckets compared to centrifugal bucket elevators. This action permits material flow over the backside of the preceding bucket. Additionally, extended sides on the buckets gently guide material into the discharge spout. These modifications create an ideal environment for fragile, abrasive, and sluggish materials. Benefits include limited material aeration, minimized breakage of friable material, and minimized product damage of fragile material.

In addition to varying configuration options, there are also a number of bucket options available, with material and elevator design being primary bucket selection criteria. Other bucket elevator features include removable top covers, access doors for easy maintenance, and horizontally and vertically heavy-reinforced, jig welded head, boot, and intermediate sections.

Bucket elevators can handle a wide range of free flowing materials with varying characteristics. Light, fragile, heavy, and abrasive materials can all be transferred using a bucket elevator. Examples of materials conveyed via bucket elevator include:

Bucket elevators are not recommended for use with material that is wet, sticky, or has a sludge consistency. These types of materials tend to create discharge issues, with build-up being a common problem.

After building custom bucket elevators for more than 65 years, FEECOs bucket elevators are able to meet even the toughest of challenges. Whether a customer is looking to transport a dry, dusty material or a heavier, more challenging product, FEECO can custom engineer a bucket elevator solution to meet the needs of any bulk material handling application. For more information on bucket elevators or other material handling equipment, contact us today!

12 common bucket elevator troubleshooting | m&c

12 common bucket elevator troubleshooting | m&c

As a kind of conveying equipment with simple structure, low maintenance cost and high conveying efficiency, bucket elevator is widely used in food, medical, chemical and mining industries, and plays an increasingly important role.

In the actual conveying operation, the efficiency of bucket elevator is affected by the problems of slipping, deviation, tearing, returning, low production and abnormal noise. In this article, we will tell 12 types of troubles and solutions of bucket elevator, to help you produce efficiently!

Reduce the amount of material feeding, and strive to feed evenly, if after reducing the amount of feeding, still can not improve skidding, it may be that too much material is accumulated in the machine or the hopper is stuck by foreign bodies.

1. When lifting different materials, the speed of bucket is different: when lifting dry powder and granule, the speed is about 1-2 m/s; when lifting bulk material, the speed is 0.4-0.6 m/s; when lifting wet powder and granule, the speed is 0.6~0.8m/s.

If the bucket runs too fast, the material will be unloaded ahead of time, resulting in material return. According to the lifting material, the speed of the bucket should be reduced appropriately to avoid material return.

The hopper is the bearing component of the hoist, which has higher requirements for its materials, so the materials with good strength should be selected as far as possible during installation. The general hopper is made of ordinary steel plate or galvanized sheet welded or stamped.

The solution is to increase the air outlet, that is, to set up the air outlet above the discharge pipe of the elevator head, and the outlet pipe leads directly to the atmosphere to reduce the dust concentration in the head so that it can not produce powder explosion.

bucket elevators: 5 factors to consider for trouble-free feeding and o

bucket elevators: 5 factors to consider for trouble-free feeding and o

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An aspect often overlooked with continuous bucket elevators is the need to consider how material is fed into the unit. As an equipment type, bucket elevators require a controlled infeed of material to operate effectively. Failing to consider how material will be presented to the conveyor can result in lost throughput, product degradation, and equipment damage and downtime.

Bucket elevators can receive material from a variety of upstream process equipment, including mixers, blenders, dryers, pastillators, etc. Irrespective of the equipment type, it is critical to evaluate how the flow of material will be regulated as it enters the elevator infeed. To perform effectively, bucket elevators require a uniform and consistent rate of feed.

In some installations, the need for a regulated flow of material into the elevator is overlooked entirely. For example, we have seen installations where a bucket elevator was being fed directly from a bulk bag (FIBC) discharger without the use of any control device to regulate the flow of incoming material. Feeding an elevator with an unregulated flow of material can result in the following:

To avoid these problems, it is necessary to use an appropriate control or metering device, such as a vibratory or rotary valve feeder, to ensure a regulated flow of material into the elevator. The choice of which type of control device to use depends largely upon the application which the elevator is servicing.

Vibratory feeders use vibration to feed material into the bucket elevator. The amplitude and frequency of vibration, together with the feeders angle of deflection, serve to move a regulated amount of material into the elevator.

Vibratory feeders work well for many material types, especially those that are characterized as fragile or difficult-to-handle. Unlike rotary valve feeders, the design of vibratory feeders allows for a controlled flow rate without any degradation of the material moving through the feeder. Given their ability to control the flow rate with no material degradation, vibratory feeders are a preferred choice in high-care applications where product degradation must be avoided.

A second advantage of vibratory feeders is their consistent feed rates. Due to their design, vibratory feeders avoid the pulsed feeding of material that can result from using a rotary valve feeder. Vibratory feeders are available in fully enclosed tray designs for dust containment or to protect the product from external contamination.

Rotary valve feeders consist of a housing barrel containing evenly-spaced rotating vanes which contact incoming material and move it through the feeder. In applications which use a bucket elevator, a rotary valve feeder can be used as a volumetric feeder to discharge bulk solid material from a hopper or bin directly into the elevator infeed.

As with vibratory feeders, rotary valve feeders offer a fully enclosed feeding solution. This reduces the risk of material cross-contamination that can occur with release of dust into the ambient environment. Rotary valves are also used as an air-lock, suitable for purged systems or used as an isolation device when handling potentially explosive materials.

Given the design of rotary valve feeders, where the rotating vanes of the feeder contact material and move it forward, there is an increased risk of product degradation when fragile materials are being transferred. Thus, rotary valve feeders are often best used in applications involving non-fragile materials. In addition, while rotary valve feeders can achieve consistent feed rates, the rotating vane design can result in a pulsed flow as the evenly-spaced vanes move material through the feeder into the conveyor.

When using a rotary valve feeder, it is preferred to orient the feeders rotational axis to be at 90 degrees to the direction of travel of the buckets. This will ensure an even distribution of material within each bucket.

For continuous bucket elevators, it is preferred to feed material in line to the elevator infeed as opposed to, for example, feeding at right angles to the elevator infeed. Feeding material inline to the elevator infeed permits a more even distribution of material across the width of the buckets. In contrast, feeding the elevator perpendicularly can result in uneven material distribution within the buckets, as well as causing increased bucket wear that results from the more concentrated impact of material. The latter point is a particularly important consideration when moving abrasive materials or heavy products through the elevator. This can be resolved by incorporating a bias cut to either the transition chute, or vibratory feeder tray.

Minimizing the height from which material is dropped into the elevator reduces product dusting and allows for a gentler transfer of material. Ensuring a gentle transfer minimizes particle attrition and is important when handling fragile or friable materials that could degrade when dropped into elevator from too high a height. In addition, minimizing the material drop height reduces impact wear on the buckets, reducing the need for maintenance interventions and replacement parts.

To ensure that no load is present at start-up, the elevator should be started and allowed to ramp up to the desired operating speed before being fed with material. This can be accomplished by setting an appropriate time delay on the control device used to regulate the flow of material into the elevator infeed. The time delay ensures that no material enters the elevator until the operating speed is reached, avoiding any potential damage to the conveyor.

Transition chutes contain and direct material as it transfers from an upstream process into the elevator infeed. Material containment is particularly important when handling hazardous or toxic materials, which usually require fully enclosed connections. These sealed connections would be made either using a direct flanged or a flexible type. Transition chutes should be designed with a geometry and size that allows for a controlled and even flow of material through the chute and into the elevator.

When buying and installing a continuous bucket elevator, be sure to discuss with the equipment manufacturer all aspects of how the unit will be fed. Addressing the factors described above will ensure that the elevator is uniformly fed with material and help avoid performance problems that can result from improper feeding.

James Bransfield is the engineering team leader for UniTrak Corporation Ltd. UniTrak manufactures the TipTrak line of continuous bucket elevators. For more information, contact Bransfield at [emailprotected] or visit www.unitrak.com.

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