What are the advantages and disadvantages of tubular pipe belt ...

A tubular belt conveyor system includes a conveyor belt having a cross-sectionally closed, curvilinear, tubular configuration including a zone of overlapping edge portions. A plurality of support and guide assemblies for the conveyor are situated along the conveyor path. Each assembly includes a plurality of support and guide rollers held about the cross-sectionally closed conveyor belt in a contacting relationship therewith. In each assembly one roller is in engagement with the cross-sectionally closed conveyor belt at the edge overlap. The closed tubular configuration in each length portion of the conveying path has an oval cross section. The support and guide rollers force the conveyor belt into the closed tubular configuration of oval cross section. The first support and guide roller of each assembly is settable onto the zone of overlapping edge portions.

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There are some advantages and disadvantages for the tubular pipe belt conveyors, SKE team will show you more as below:

Advantages:

1) The conveyor belt selected for tubular pipe belt conveyor is similar to the general conveyor belt, so it is suitable for the user's habits and is easy to be accepted by the user. The conveyor belt selected for other types of enclosed conveyor belt conveyors is not the same as the general belt type, which has big difference. 

2) It can prevent external debris from being mixed into the transported materials, and can also prevent the materials from being exposed to rain or sun.  It can complete the carrying section and the return section completely closed and transported. In principle, it can avoid material leakage and spilling, which can meet environmental protection requirement.

    3) It can complete flexible layout planning, can complete small-radius three-dimensional space turning, avoid the establishment of intermediate transfer stations and the capital and maintenance costs of corresponding auxiliary equipment!  Especially suitable for transportation lines in a small space or a messy environment such as obstacles Construction shortens the transportation interval and reduces the total cost of the project.

   4) It can complete transportation at a large inclination angle. Generally, trough-angle belt conveyors can only increase the viewpoint to about 18° at most. However, because the conveying belt encloses the materials in the tube, the pipe belt conveyor increases  the friction between the material and conveying belt, and the transportation viewpoint can be further improved. The round tube belt conveyor that has been put into normal use can reach a maximum of 30° inclined transportation, and there is also a proposal to choose a round tube belt conveyor for vertical elevation. 

5) It can easily complete the two-way material transportation, because the tubular tube belt conveyor uses closed tubes for transportation in the load-bearing section and the return section. If the feeding point is installed in the return section, the return section can still transport materials, and the intermediate feeding can be completed by opening and closing the conveyor belt at any point

6) The width of the frame is small, and the tubular pipe belt conveyor uses a circular cross-section to transport materials, and obtains the same effective transport area with a lower bandwidth. According to statistics, in the case of the same transportation section, the use of tube pipe belt conveyors can be reduced by 1/3 of the original in the width direction, and then reduce the space requirement during civil construction, reduce the consumption of structural materials such as steel, and reduce related costs and Working hours.

 Disadvantages

 1) The raw materials and production requirements are relatively high. Although the conveyor belt selected for the tubular pipe belt conveyor is still a flat conveyor belt, it is necessary to guide the conveyor belt into a round tube shape and require sealing at the same time, so the margin of the conveyor belt is different from the general belt conveyor . In order to guide the conveyor belt into a circular tube shape and maintain the circular tube shape during the operation of the conveyor, the rigidity requirements of the conveyor belt are also different, which requires special consideration in planning and production.

 2) Because the material is enclosed in the tube during the operation of the conveyor, the squeezing force between the material and the conveyor belt is increased, so the operating resistance coefficient of the conveyor is larger than the general belt conveyor.

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3)  Compared with general belt conveyors, the conveying volume is small under the same belt speed and bandwidth. For example, when the bandwidth is mm, the maximum cross-sectional area of the material of the universal belt conveyor is 0.m2. The idler groove angle is 35° and the accumulation angle is 10°, while the material cross-sectional area of the tube belt conveyor is only 0.m2.

4)  Design calculations are troublesome. Because the structure of the tube belt conveyor is more messy than the general belt conveyor, its planning and accounting are more messy. In particular, it should be pointed out that the running resistance of the tube belt conveyor increases with the increase of the running speed, and it is difficult to select the running resistance coefficient in the practical planning.

5) From the structural point of view, the "tubular pipe belt conveyor will not cause the belt deviation problem like the general belt conveyor, but there is a problem of changing the conveyor belt. In severe cases, the edge of the conveyor belt will enter the two idlers. In the gap, causing damage to the conveyor belt.

The actual reduction in power consumption depends on many factors, including rubber compound, total lift or drop, belt rating, material and load carried, idler spacing and arrangement, and the vertical and horizontal curves made by the belt. Overland troughed belts designed by Forech's design partner CDI have achieved 40% power savings, which also includes optimisation in layout and motors. For pipe belt, belt cross sectional stiffness plays an important role in power consumption, and the power saving needs to be defined and monitored on a case-by-case basis.

Radial or cross-sectional stiffness is of interest. The belt has a longitudinal stiffness also, but this property and its value does not affect the pipe formation in any way. Longitudinally, belt tension combined with idler spacing/arrangement governs the belt behavior.

As the LRR cover is not even coming in contact with the conveyed material, and only running over idlers, the mechanical properties including tensile strength are more than enough to ensure good performance.

Even if you are using the conveyor as a reversible conveyor, DIN-K and IS: cover strength is more than adequate for carrying coal; which is the usual material transported in Fire Resistant belts.

The choice of fixed pitch or variable pitch in pipe conveyor belts has traditionally been a legacy issue of different manufacturers. It is possible to meet pipe belt stiffness and troughability requirements with either fixed or variable pitched steel cords, and neither one is intrinsically better.

The life of a pipe conveyor belt depends on the material being carried, maintenance, and operating speed. In general, it has the same lifespan as an equivalent troughed belt; though if a pipe belt is used to traverse very sharp curves that a troughed belt cannot, fatigue may set in earlier.

On a case to case basis it may be possible, Using LRR reduces the belt tension and maybe belt rating, but belt safety factor in general is kept the same.

Belt safety factor can be reduced if the following are also provided:

If you want to learn more, please visit our website Burning Resistant Conveyor Belt.

• optimized starting/stopping control
• advanced splicing material
• good splice design/workmanship.