5 Considerable Points in Bucket Elevator Design

5 Considerable Points in Bucket Elevator Design

Bucket elevator can be preferably used in many industries, so know selection of bucket elevator is an important part. What are precautions during bucket elevator selection process? They are summarized as follows: 

1. Generally, bucket elevator tape can be divided into ordinary and heat- resistant belt of wire rope. Ordinary belt of wire rope is suitable for material with temperature below 80 ℃, while heat-resistant wire rope tape applies to material with temperature below 120 ℃. 

2. Taking uneven feeding material and material block size into account, lift amount of margin should be larger when selecting bucket elevator. 

3. There is no need that setting a separate foundation in the head casing of bucket elevator. Users may indicate whether you need a maintenance platform according to the real working condition. 

4. If you select bucket elevator type, please provide the following parameters: desired height, material type, particle size, density, temperature, feeding device name, etc. 

5. If it is transported coal ash materials, please make sure that bucket speed should be less than 1.3 m / sec, and the transmission part should make extra design.

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 

Correct Methods, Avoid Accident

Correct Methods, Avoid Accident

1.What should users focus on first is that the belt conveyor must be installed on fixed foundation according to regulated installation method.

2.Before being put into use, belt buckles and bearing device of belt conveyor should be in a normal status.

3.It’s forbidden that users put materials first and turn on the power second. The right stpe is that when the belt conveyor is running well, the materials can be fed.

4.During operation, it must stop the machine if there occurs the phenomenon of belt alignment.

5.The most appropriate working and matrial temperature should between -10℃ to 50℃.

6. Electric motor should be in good insulation.

7.It’s prohibited that operator uses hands to pull belt when the belt is slipping in order to avoid accident.

How do We Install Asbestos Tape on Bucket Elevator

How do We Install Asbestos Tape on Bucket Elevator

Those days, three bucket elevators have been installed which were ordered by our Australia customer. During installation, our customer want to know where the asbestos tape should be installed. Today, our PK Machinery will introduce you its function and installation method. 

Asbestos is composed of fibre bundle, and the fibre bundle consists of fibre which is thin and long and can be separated with each other. The asbestos tape is made of high quality asbestos yarn. It has advantages of fire resistance, electric insulation and heat-resistance. And it can be used for the sealing material of all kinds of equipment.

It is required that the installation of bucket elevator needs good sealing. And asbestos tape is the most commom use material in sealing bucket elevator. It can not only prevent powder leakage, but also reduce the waste rate of material. The right installation position of asbestos tape is that it should be installed at the joint between two flanges. It should put the asbestos tape between two flanges and then connect flages with bolts. Please look at the following picture for your reference. More information, please visit our website:www.pkmachinery.com.

 

Why does your bucket elevator with low efficiency

Why does your bucket elevator with low efficiency

Material were failed to filled hopper: There are four factors affecting the degree of material filled, Is the limit of material surface level, respectively head rotation angle and shape of the hopper, material accumulation. The more limit higher material surface, the better filled with the greater; Slower wheel speed, fill the hopper with the greater; Material accumulation angle increases, it means shaman worse, hopper filled with higher degrees; It’s easier to filled if the hopper mouth is smaller, so the shape of hopper should be inverted triangle, and the lighter hopper is easier to filled than the deeper one. In a word, to filled the hopper, needs the slower wheel rotation speed, the higher hopper mouth, and the shape of hopper should be more reasonable.

Spreading material from lifting: opening the head cover of bucket elevator, and observe the full degree of hopper at the bottom of the fill level in curve hopper, it means the lift sub if the top is less than the bottom. There are three reasons cause of spreading material: the first is the initial tension of the chain is insufficient, hopper reverse due to its own weight. Second is its own vibration, such as the vibration of rotational inertia of the wheel, the chain is not flexible. Vibration will reduce the stacking height of granule material. The solution is as follows: Adjust the initial tension of the chain, bucket elevator rotation to achieve balance; Improved chain joints, balance as far as possible. Increased isolation measures; Reducing mechanical vibration.

 

The bucket elevator enhance reflux: the material cannot be thrown into the discharge tube totally but return the frame. Reflux is the main reason cause of low efficiency of bucket elevator. You can check the bucket elevator machine drum, if it has a noise just like raining, judge the extent of reflux according to the noise. It’s more useful for iron shell bucket elevator. Analysis the reason of reflux: open the head cover and observe the total material trajectory carefully. Where the material thrown high and far, crossing over imports of the feed tube, which means head shell size is too small. Solution is increase the size of head cover.

 

Have You Ever Know Conveyor Belt Water Scraper

Have You Ever Know Conveyor Belt Water Scraper

Indeed, conveyor belt is widely used to convey coal, cement, limstone and other lump materials. And mostly, the working environment of conveyor belt is outdoor, as well as it cannot install conveyor rainproof cover to protect machine. Thus, it's better for users to sweep away stagnant water by water scraper.

This kind of water scraper consists of frame, rollers, shaft, bearing block, electric-hydraulic pusher and other parts. When the conveyor belt is idle running, compression roller will rotate clockwise that driven by electric-hydraulic pusher, and then it will make troughed idlers flat.Under the clamping pressure of compression roller and carrier rollers, the belt is lifted up,under this circumstance, water will be discharged from both sides of the conveyor belt. Therefore, it can achieve transition between normal running and water removal through the rotation of rotary body. 

The water scraper has simple and reasonable structer that can avoid scratch belt. And it is easy to be intalled, has long service life. Meanwhile, it is the best choice for end users.

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 !

Discharging Ways of Bucket Elevators

Discharging Ways of Bucket Elevators

PK Machinery mainly offers bucket elevators with belt type,ring chain type and plate chain type which is mainly suitable for feed mills, flour mills, rice mills, oil, starch factory, grain depot, port terminals and other bulk materials conveying industry.

 

According to different discharging ways, bucket elevators also can be divided into: centrifugal type bucket elevator, gravity type bucket elevator and hybrid type bucket elevator. The introduction is described as follows:

1. Centrifugal type: it is using centrifugal force to throw the material away from discharging outlet which is applicable to the material that is dry with fast lifting speed and small particle.

2. Gravity type: under the effect of gravity, the material will discharge along the bucket back , it is suitable for material which is large and fragile.

3. Hybrid type: centrifugal force and gravity force , which is suitable for material with poor fluidity and big humidity .

How to Select the Suitable Belt for TD Belt Bucket Elevators

How to Select the Suitable Belt for TD Belt Bucket Elevators

Different bucket elevators should match different belts as their traction.This article mainly introduces the suitable belt for TD bucket elevator.

TD belt bucket elevator uses belt as its traction, there are pitches between buckets, normally ,the buckets will be fixed with belt by bolts. General used belts include: ordinary rubber belt, nylon rubber belt and steel cord rubber belt. Here PK Machinery will introduce how to select the suitable rubber belt :

Ordinary rubber belt adopts cotton as its core, then molded after being coated with rubber vulcanization,. Usually, the ordinary rubber belt is used for bucket elevator with small lifting height.

Nylon rubber belt adopts nylon canvas as its core,then molded after coated with rubber vulcanization, it is usually used for TD belt bucket elevator with the height that is relatively big.

Steel cord rubber belt is made of steel rope as its core and molded after being coated with rubber vulcanization. The strength of steel cord rubber belt can meet the requirement of high rise and large capacity development . In recent years, the demand of hundred meters’ lifting height and high efficiency bucket elevator is increasing day by day, the steel cord rubber belt bucket elevator would be a good choice.

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.