4 key factors decide the function of bucket elevator

4 key factors decide the function of bucket elevator

Bucket elevator can be installed singly or in a system, in order to meet the needs of the site and materials forms. The main parameter of the bucket elevator is according to the handling system, loading and unloading location conditions, production process and the characteristics of transported material,main aspects are as follows:

1. Conveying capacity: it means the amount per hour, usually calculated in weight or volume.

2. Conveying speed: improving the speed can increase the elevating capacity. Especially when use the belt bucket elevator for long distance transporting,it needs to improve the conveying speed, but if use chain bucket elevator you should not, in case of enlarging the burden.

3. Pats dimension: the dimension of parts include belt width, plate width, bucket volume, channel diameters and so on, these dimensions will have an impact on the conveying capacity.

4. Conveying distance: the total distance will have an impact on the total resistance and power.

Why is Bucket Elevator Asbestos Tape so Important

Why is Bucket Elevator Asbestos Tape so Important

We have received the feedback from our Australia customer recently. Learning that threebucket elevators had already installed and our customers knew less about how to install the asbestos tape, so here we will describe its installation methods.

Asbestos consists of fibre bundle which is made of long and thin fibres. Due to its highly fire-resistance, electric insulation and heat-resistance, asbestos tape can be widely used in sealing materials of various machines or other asbestos products.

Because of high requirements about installation quality of bucket elevators, we usually adopt asbestos tape as its common sealing material. Asbestos tape can not only prevent dust leakage and protect environment, but also reduce material waste. During the real installation, asbestos tape must be positioned in the connection of casing flanges. Before connecting flanges, please add the asbestos tape in the connections and then fix the bolts. Please see the following picture as your reference.

Right Way to Solve Bucket elevator Ash Leak

Right Way to Solve Bucket Elevator Ash Leak

(1) Gasket in the flange of the whole bucket elevator casing is damaged or leakage. Please replace a new one and smear sealant as well as retighten flange bolts.

(2) If materials leak from head section and base gap, please add gasket or smear sealant.

(3) If elevation difference of feeding materials is large, it will increase the feed pressure. So please change the feeding method and add the damping device. 

(4) The transmission chain is idling, please adjust the chain length.

(5) Installation of casing is not properly, please adjust the verticality of full casing length in a right positive.

Bucket Elevator Casing Embossing Process

Bucket Elevator Casing Embossing Process

Embossing is commonly seen in the bend place. Generally speaking, according to the force requirements of bucket elevator middle casing, steel plate will be folded into geometric shapes (such as rectangle, etc.) or grooved shape in order to ensure and strengthen the intensity and stiffness of casing side. Through this kind of technology, it can enhance bucket elevator rigidity so that to prevent its deformation caused by uneven force. Meanwhile, material consumption and investment costs could be saved as well as to ensure the aesthetic appearance.

1. Stiffness Properties Advanced

Stiffness refers to the ability of material or structure to resist elastically deformable. The steel plate intensity and rigidity of bucket elevator casing can be enhanced by embossing process. Therefore it will reduce the casing deformation.

2. Improve Strength Properties

Strength refers to the ability of metallic materials to resist permanent deformation and fracture under the external force. Making a flute in the proper position of bucket elevator casing can increase its local intensity and reduce component breakage costs.

3. Reduce Costs

Ensuring the same intensity and rigidity, it can save steel plate dosage and reduce production costs by embossing process.

What Problems Will be in the Material Lifting Process of Bucket Elevator

What Problems Will be in the Material Lifting Process of Bucket Elevator

In the material lifting process of bucket elevator, there may be such problems: insufficient material lifting rate, insufficient material discharging rate and material leakage phenomenon, only they are resolved timely ,the bucket elevator can have best effects .The reasons and solutions are as follows: 

(1) insufficient lifting rate:

The material is likely to be caked on the bucket or chute, clean and remove the materials regularly according to caking condition. There is also possibility that the storage capacity of bucket elevator upstream equipment is insufficient which causes less feeding material, as result, the bucket elevator can not reach the design capacity, so we should try to improve the production capacity of upstream equipment. If the speed is slow, we have to change the speed ratio of the sprocket. Or it is caused by improper or wrong material calculation, check the calculator and material proportion, calculate again.

(2) insufficient material discharging rate:

The capacity of bucket elevator downstream equipment is small, make the discharge chute block, so we should improve the capacity of the downstream equipment of bucket elevator. It may also cause by small chute size or inappropriate chute angle ,so adjust the discharging chute. There is also a possibility that the material is caked on the chain bucket or inside the chute, so we need to remove material and maintain the bucket elevator periodically.

(3) material leakage phenomenon:

If the material leaks from the gap of head section and bottom section, please add the sealing gasket or glue with sealant . Replace new sealing gasket ,glue with sealant and tight the flange bolts if there gasket of bucket elevator flange is broken. If it is caused by large material feeding height difference and feeding pressure, please change the material feeding method and add the feeding buffer device.

How to Solve Problem of Bucket Elevator Ash Blocking

How to Solve Problem of Bucket Elevator Ash Blocking

After technicians analyze the situation and reasons of bucket elevator blockage, they have found that most this kind of situation is caused by unreasonable design of bucket elevator. Now PK Machinery has put forward two methods to solve ash blocking on connecting pipe of bucket elevator. 

1. Increase the tilt angle of this connecting pipe so as to increase the flow speed of coarse and fine ash in the tube and reduce the chance of plugging ash. But this programs need to improve the overall height of all scraper conveyor. 

2. Add a vibrator below the connecting pipe to make it send ash actively. Interlock vibrator and start-stop signal of removing ash system so that it can achieve intermittent vibration. Vibration time, frequency, intermittent time can be adjusted and added to the control system according to bucket elevator working condition to achieve automatic operation. This program can solve the phenomenon of ash blocking on connection pipe.

What Should We Know About Type Selection of Bucket Elevator

What Should We Know About Type Selection of Bucket Elevator

Bucket elevator is a kind of hoisting equipment which is extensively used for cement, chemical products, grain, slag and many other materials or products. But how much do you know about model selection of bucket elevator? Here PK Machinery will illustrate the knowledge from the following aspects:

1. Materials
A.Name of material:_____
B.Density of material:_____t/m3
C.Particle size:_____mm
D.Handling capacity:_____t/h
E.Water content of material:_____%
F.Material temperature:_____℃
2. Height
A.Lifting length(distance between inlet and outlet):_____m
B.Outline height of bucket elevator:_____m
C.Distance between shaft of head drum and tail drum(shaft of chain wheel):_____m
3.Driving Device
A.Brand:domestic or imported?
B.Voltage:__V__Hz3ph
4.Other Parameters
A.Working condition, indoor or outdoor?
B.What is the upstream and downstream equipment?

Above mentioned model selection parameters are essential,if you have other special requirements,please let us know . More information or any interest, please visit www.pkmachinery.com 

The Solution to Solve Blockage of Bucket Elevator

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.

Bucket Elevator Holdback Problems during Operation

Bucket Elevator Holdback Problems during Operation

This article mainly tells us that when using bucket elevator, why sometimes there is abnormal holdback problems operation phenomenon during operation.

While using bucket elevator, sometimes there is abnormal holdback operation phenomenon during operation, do you know the reason?

In fact, during the operation of bucket elevator, sometimes there will be operation stopping inevitably due to malfunction or heavy-loading, even the breakage of link chain or belt could occur, then cause reversal. The reverse operating can cause collision of the bucket and material that remain in the bottom, this could easily cause deformation of bucket and will not function well due to severe damage. Overloading situation is easy to occur if not pay attention to feeding capacity.

Under normal circumstances, the bucket of bucket elevator will lift the material from the bottom to the discharge port which is located on top of bucket elevator and then throw out. In order to ensure the production, when designing and manufacturing equipment, manufacturers just consider that the equipment will not reverse under the non-load condition, because bucket of lower part is two more than upper part, which will be much heavier than the upper. In order to prevent the breakage of belt or link chain or reversal occur in the bucket and link chain, especially when the bucket elevator is under the overload condition, the backstop should be installed at the external of bucket elevator in order to avoid the problem of overload.

 

The bucket elevator holdback consists of reverse rod, revolving shaft, retracting spring and dowel pin etc. In the process of normal operation of bucket elevator, the reverse rod will be upswing after hit by the sleeve, it will fall under the action of retracting spring force, then upswing after hit by another sleeve, not affecting the normal operation of equipment. If there is reversal of bucket elevator, the dowel pin will halt the reverse rod, so it will no longer swing down, and the sleeve will also be blocked by the reverse rod, hence the whole link chain could not reverse. If there is too much material spilled inside the body of machine and fall on the reverse rod, it will cause the failure of holdback.

If there is too much materials outside the bucket elevator, it will affect the rotation axis of screw. We may see there will be stacked with material in the pit of bucket elevator on the user’s site, which will seriously affect the operation of the relevant parts of holdback.

4 Methods to Solve Uneven Rotating Speed of Bucket Elevator Problem

4 Methods to Solve Uneven Rotating Speed of Bucket Elevator Problem

If rotating speed of bucket elevator is uneven, it will affect the efficiency of bucket elevator capacity. So here we will introduce 4 methods to address this kind of problems and hope that can help you.

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.

Troubleshooting of Abnormal Noise during the Operation of Bucket Elevator

Troubleshooting of Abnormal Noise during the Operation of Bucket Elevator

When operating bucket elevator, do you know how to trouble shoot if there is abnormal noise? Here, PK Machinery will analysis it and hope it can help you.

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.

 

Five Phenomenon will Lead to Bucket Elevator Dust Explosion

Five Phenomenon will Lead to Bucket Elevator Dust Explosion

Do you know which five phenomenon will lead to bucket elevator dust explosion? Today, PK Machinery will analysis the damage and main reasons of it. Hope it can help you.

Bucket elevator is widely applied in industrial and agricultural production. In the process of loading materials, the buckets of bucket elevator will strike on the material at a higher speed, which causes a great friction and impulsive force on materials, and will result friction between materials. Hence, the dust material dust will be blown out. When unloading the materials, materials will be thrown from the bucket, which also cause the dust blowing out. 

In order to control the dust leakage, bucket elevator works under the condition of completely sealed, the enclosed space virtually increased the risk of explosion. Although the bucket elevator is worked in a sealed condition, the casing is not very tight, the air can enter through the connector and inlet port. Therefore, there is presence of large amounts of oxygen in the internal. When there is a fire, it can generate dust explosions. Bucket elevator can create dust explosion may be due to undesirable of machine operation, where there is high possibility of creating a spark. The main reason is as follows:

(1) if particle flow contains metallic impurities, it may collide and rub with the bucket in the process of the flowing, this will create spark.

(2) if belt deviation occurs and rubs with casing, it may produce spark, so in order to prevent the sparks, it is better to use the chain bucket elevator.

(3) when buckets or screw fall off, it can produces sparks when rub with other components.

(4) when bearing overheats or belt skid for a long period, it can achieve ignition point of dust explosion.

(5) the open flames enters, igniting dust explosion etc.

 

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Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Belt conveyor, and Vibrating 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. 

How to Solve the Insufficient Lifting Capacity Problem of Bucket Elevator

How to Solve the Insufficient Lifting Capacity Problem of Bucket Elevator

Bucket elevator offers a good help for conveying material in the factory, however, many users may doubt that why the actual work efficiency is not as good as they expected, such as insufficient lifting capacity problem, here PK Machinery will introduce some methods to increase the bucket elevator capacity in following six aspects: 

1.increase the elevator speed, change the driving wheel transmission ratio
2.increase the downstream equipment capacity of bucket elevator
3. make sure the buckets are full of material.

 

4. clean the sticky materials on the buckets and wheels regularly
5. fix and correct the chute of discharging outlet
6. avoid material inside the buckets return back

Solving the lifting capacity problem of bucket elevator effectively can not only solve the conveying efficiency for the users, but also can meet the production requirements, in our daily life of operation, please pay attention to this problem !

The Reason and Solution to Bucket Elevator Material Accumulation

The Reason and Solution to Bucket Elevator Material Accumulation

(1) Uneven material feeding. When feeding is too much, the feeding rate exceeds the lifting capacity which makes material remain in surplus and accumulation, besides, the materials inside the base elevates gradually, the running resistance of the buckets increase gradually and reach a certain extent, the rubber belt will slip which will cause machine shut-down or motor burn-down.

Solution: Control the feed rate strictly, non-load operation first then open the gate of material incoming gradually. Observe material rising condition by the front inspection door. When material surface reaches bottom wheel unparallel axis line, the material feeding gate can’t be wide open any more.

(2) Large material returning flow will make material can’t flow to discharge pipe and return to the base, thus the base material is increased and will lead to blockage.

Solution: reduce material backflow.

(3) When machine suddenly shut down due to power failure or other faults, the mass weight of lifting branch and the returning branch is unequal, which makes the bucket elevator reversed, the material inside the buckets return back to the base, it will lead to base blockage when you start the machine up again. 

Solution: Installing a holdback device in the side of the elevator shaft to prevent bucket elevator reversals.

(4) Rubber belt slipping will reduce the lifting capacity of the bucket elevator, thus the material inside the base will increase and block. 

Solution: increase the tension, prevent belt slip.

(5) Big foreign lumped material enters into the base and causes blockage.
Solution: Install guard fences at bucket elevator inlet to prevent accidents.