Three Types of Conveyor Belt Stretching

1. Elastic stretching
   1. Happens at the time of belt conveyor system acceleration or braking deceleration;
   2.  Happens at the time when pulling stress disappears, and can almost be fully recovered.

2. Structural stretching
   1. The possibility due to the conveyor belt fabric type is higher than that due to the textile type.
   2. In the fabrics that weaved according to traditional types, the frizzy

Yarn is easily to stretch when the belt conveyor system is loaded, certain part of this conveyor belt stretching is unable to be recovered.

3. Permanent change in length (permanent stretching)

Mainly caused by the fundamental fabric structure stretching, unrecoverable elastic stretching or structural stretching.

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Function of Comb Roller

Comb roller is also named comb sweep roller,it not only has a good leakproofness，but also has many omnibus characteristic，such as wear resistance,fatigue durability,corrosion resistance,ageing resistance,tear resistance,buffer performance,good elasticity,etc.It is usually installed on the return segment,the structure of comb roller is more complex than ordinary roller,as shown in the following drawings,there are some quantity of rubber rings on the roller surface,to avoid the direct contact between roller and belt,so it makes a good protection for rollers,in addition,the maintenance cost of comb roller is much lower,once roller wears,only need to change the rubber rings.
The comb roller also can protect the belt,during conveying,some material will spatter on the return belt inner surface,if don’t clear them in time, they will wear the roller and belt,even cause the belt deviation,however,comb will solve this trouble,because there are intervals between rubber rings,the material which spattered will fall into the intervals,they will not wear the belt,and because of the comb roller structure,the material will be cleaned up.

What’s the Developing Trend of Belt Conveyor?

Low-end products occupy a large proportion in belt conveyor industry, with the daily improvement of the technology, changes would be made in the future development of the belt conveyor manufacturer. The forthcoming belt conveyor system should contain the following 5 features:

1. High conveying capacity and speed;

This also means high productivity and low manufacture cost in unit time.

2. Long service time;

The abrasion between the conveyor belt and the roller is the main reason that restricts the service time of the belt conveyor. It needs further improvement in the future design.

3. Low cost of production;

Adopting non-roller support or non-contact support is the most efficient way to lower the belt conveyor cost.

4. Low power consumption ;

80% of the belt conveyor power is consumed in friction wastage. To reduce friction wastage, the most efficient way is adopting non-contact type belt conveyor.

5. More intelligent.

It would be closely associated with microcomputer and intelligent operation would be reached in the future.

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How to Correctly Make Maintenance for Belt Conveyors

As we all know, correct and proficient operation is the guarantee for the efficient working of the belt conveyor.

Excluding the impact from the sundries in the material, in order to improve the conveying efficiency, operators should pay attention to the following points:

1. Make fix and appropriate installation of the belt conveyor machine.
2. Check the belt conveyor before operation.

Make sure the protecting device is all ready, the belt tension is adjust to appropriate degree and so on.

3. The belt conveyor should start with non-load and then be fed after its normal operation.
4. If there are several belt conveyors operate in series, then they should be started in order from the discharging port. Do not feed materials until all conveyors are operated normally.
5. The working condition of the belt conveyor machine. The temperature of the conveying material should between 50℃ and -10℃, and materials with acid and alkali should not be conveyed.

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The Use Skill of Corrugated Sidewall Belt Conveyor

Corrugated sidewall belt conveyor is widely used in material handling industry. It has a lot of advantage, higher transportation capacity, the material is not easy to leak, slide prevention etc, it is welcomed by the masses of customers. So what are the use skill of corrugated sidewall belt conveyor in the process of using ?Here, Henan Pingyuan Mining Machinery Co., Ltd answers for you.
1.It is strictly prohibited to use different belt together.
2.The transport direction of the material and the dropping speed of material should be consistent with belt conveyor.
3.Non-load machine start, in order to avoid motor overload and large angle conveyor belt skid, before shutdown, all material should be unloaded completely.
4.When using corrugated sidewall belt, you should prevent belt folding and hard objects pressing, it should be curly using and preservation.
5.Corrugated sidewall belt tension should not be too big, please guarantee that it is used under the minimum tension.
6.In the using of corrugated sidewall belt, if there is a sliding or pulling up phenomenon, you should timely troubleshooting, adjust the tension system, keep the elastic device is flexible.
7.If there is belt deviation or sinusoidal running , you should adjust it timely.

Type and Feature of Belt Conveyor Tension Device

Tension Device is one of the core compositions in the belt conveyor, mainly used to supply certain tension force for the normal operation of the conveyor belt. Therefore, selecting proper tension device is the key to design belt conveyor. There are three types of tension device, in the following the feature of these three device would be introduced.

1. Screw-type tension device

The screw type tension device is installed at the tailing pulley of the belt conveyor and adjust the tension of the conveyor belt through regulating the screw to make it move.

It is generally applied in the belt conveyor with belt length less than 60 meters and small power. The series of belt conveyor tension device including 500mm and 800mm there stow kind.

2. Vehicle-type tension device

The vehicle-type tension device means installing the tail pulley on the movable vehicle, and use the steel rope to connect the vehicle and heavy hammer separately through the revising pulley, this automatically tension the conveyor belt by the gravity of the heavy hammer.

3. Vertical hammer type tension device

The vertical hammer type tension device is installed between the transmission pulley and the tailing pulley, and should be close to the site with least tension. It reacts quickly when the belt conveyor starts working with good tension effect. 

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The Pulley Diameter Analysis of the Belt Conveyor

In the designing of belt conveyor, the correct selection of pulley diameter is of great significance. The conveying belt use conditions improve with the increase of the pulley diameter. However, with the same other conditions, increasing the pulley diameter will correspondingly increase its weight, the transmission ratio,amount and size of the reducer. Therefore, the pulley diameter should not be too small to ensure delivery with normal operating conditions. Thus, traditional pulley diameter directly affects the whole cost and weighting the driving device of the conveyor belt.

In the selection of the pulley diameter, the factors below are generally considered:

1. The thickness of the conveying belt and the bending stress related to the thickness when it enlaces the pulley.
2. The total stress that the conveyor belt bears, including the pulling stress and the bending stress.
3. The maximum or average unit stress between the conveyor belt and the pulley surface.
4. The circle times that the conveyor belt bears bending load, the enlacing methods and number of its rolling the pulley.
5. The type of the conveyor belt and installation site.

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