Caution of the Bucket Elevator Selection

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:

Bucket Elevator

1. General bucket elevator tape as an ordinary rope wire rope heat tape and tape, rope tape suitable for general below 80 ℃ materials, heat-resistant wire rope tape applied to below 120 ℃ materials.

2. Taking into account the feed is uneven, uneven material block size and other factors, in selecting hoist, lift amount of margin should be larger.
3.The bucket elevator drive bracket and maintenance platform installation on the head of the shell, does not need the other set. The user should state that whether to overhaul platform according to the need.
4.The bucket elevator has a head housing flange for dust, such as conveying powder materials can be accessed by a large dust collector.
5. If the selection please provide the following parameters: the desired height, material type, size, density, temperature, moisture, feeding device name used indoors or outdoors.
6.When transporting ash materials, the bucket speed should less than 1.3 m / sec.The transmission part should be an extra design.

Model Selection of Belt Bucket Elevator

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Mainly Factors about Model Selection of Bucket Elevator

As common used lifting equipment, selection of bucket elevator is effected by many factors, wrong model will give customers endless troubles. Generally, model selection of bucket elevator depends on the following factors.

1. Material shape: powder, granular or small lump material.

2. Physical property: adsorbability or viscosity, and moisture content.

3. Proportion of material: common bucket elevator parameters are designed and calculated according to the materials which mass density under 1.6. While large proportion of materials are according to tensile strength of traction and drive part.

4. Unit conveying capacity:

Generally speaking, shape of material directly determines the discharging method. It is common practice that powder materials use centrifugal discharge and gravity discharge for lump materials. In addition, different charge method determines the different type of bucket, centrifugal discharge always use shallow or arc bucket, while deep bucket for gravity discharge. The unit conveying capacity of bucket elevator is different as its different bucket type. The conveying capacity of bucket elevator is a comprehensive parameter that depends on bucket type, speed, proportion of material, property of material and number of bucket. Selection process is as follows: proportion of material, property of material, discharging method, bucket type, conveying capacity and the model.

 Bucket Elevator

How Much do You Know the Reasons of Buckets Falling of Bucket Elevator?

1.Too much feeding. It will cause material blocking in the machine, and increase elevator resistance. Feeding too much is the main reason of buckets’ falling. Stop the machine immediately in the situation, and take out spile under frame. Discharge material in engine base, replace new buckets, and then start to production. Meanwhile, decrease feeding volume uniformly.

2.The position of inlet is too low. In general, bucket serve materials from inlet automatically when bucket elevator is in operation. If the position of inlet is too low, buckets may have no time to serve materials and then most materials into engine base. However, materials are lump, which is easy to cause the deformation and falling. Inlet position should be above the center line of return pulley.

3.Bad material of bucket with limited strength. Buckets are the bearing parts of bucket elevator, and have high requirements on buckets materials. Select material with high strength when install. In general, buckets are welded or pressed by common steel plate or galvanized plates, and edges should be folded or involved in galvanized wire to enhance the strength of buckets.

4.Haven’t discharging materials in engine base when starting up. There is always down phenomenon caused by power failure or other reason in operation. And when re-start, buckets are easy falling as too much impact if no discharging materials in engine base. Therefore, must discharge materials in engine base to avoid buckets falling. In addition, check the connection of buckets and belt regular. If screw is loose or falling, or buckets are damaged, check and replace in time to avoid more accidents.

Bucket elevator

    

How to Solve the Problem 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.

Solution: 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.

Bucket elevator

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.

Bucket elevator

The Right Way to Install the Bucket Elevator

1.Before the installation you should fixed base firstly, base should be fixed on the reliable basis, then connected to the machine base barrel step by step, finally connecting the handpiece and installing gear motor.

Bucket Elevator Bearing

2.After installation and alignment the whole machinery, you should make sure that barrels across the floor and must be fixed with the floor, if it has attachment then you should install bearing housing bracket to prevent the whole machine tilt and displacement.

Bottom Section

3.In order to ensure seal the barrels connection allows to use the barrel gasket.

Inspection Window

4.Hopper should installed on the hopper belt as required, hopper belt with hopper were placed from both ends of the handpiece. When you install the hopper belt, you should raise the bottom wheel to the highest position.

Middle Section

5.Aligning the head wheel shaft to horizontal, and make the head and tail wheel shaft are located within a unified vertical tail plane.

6.Bucket elevator is one kind of vertical transportation equipment, head wheel, bottom wheel, and barrels should be sought in the same vertical line; the deviation per meter length should not more than 2 mm, the accumulation of deviation should not more than 8 mm.

Bucket Elevator

7.Hopper mounted in the elevator, there should not happen deviation result in the housing crash 

8.The hopper belt tensioning device should ensure the necessary uniform tension during normal work.

9.After finish the elevator installation, you should filled every lubrication part with oil lubrication, before the loading test and put into production you should make sure that the no-load test can normal work.