belt conveyor deviation analysis and partial prevention measures

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The belt conveyor belt in the port of loading and unloading of bulk material handling

professional equipment, mainly used in the delivery of the coal, ir on ore and other bulk

cargo from the stack, fertilizer, grain and other goods filling. It is easy to use, high

efficiency, easy to realize the advantages of automation control, belt conveyor to the

normal operation of great significance to ensure the normal production of the port.

Therefore, the normal use of the belt conveyor to the important work of the port in the

Device Manager.
  Deviation is the most common fault in the operating process of the belt conveyor of the

conveyor belt, its great harm, from the actual running situation, the deviation of belt

machine is running as well as production in the following areas:
  (a) has been deviation caused by system downtime affects the efficiency of production

operations. When the belt deviation reaches a certain level, the belt will trigger the

emergency stop device for anti-bias, resulting in the shutdown of the operating system,

affecting the production process.
  (b) non-normal damage caused by equipment parts. First, the belt deviation so that the

roller, roller bear axial force increases, causing the drum by channeling shaft roller

bearing damage; Secondly, the belt deviation caused by material falling on to the return

belt, causing the belt and the roller normal wear and tear, shortening the roller and belt

life; In addition, the deviation belt at run time with the bracket abnormal friction,

causing the belt edge wear, affecting its life.
  (c) easy to form a security risk. Serious deviation due to the belt, the belt rolled

material, causing the belt unilateral force over the belt longitudinal tensile force,

causing the belt lateral tearing, and other security risks.
  (d) pollut ion of the environment, affecting the transport of materials quality. Material

in the crisp and clean-up process is often caused by coal dust, pollution to the

environment; the same time, the material spilled impact on the transmission quality of the

goods.
  Thus, in actual operation, the belt deviation damaged belt machine itself is not only

great, but there are security risks, impact on production efficiency and transmission

quality of the goods \\\\ pollute the environment o
  Belt Running Cause Analysis
  Belt Running the direct cause of two: First, the driving force imbalance suffered by the

conveyor belt on both sides; Second, the roller or rollers on the conveyor belt of lateral

force.
  1.1 The conveyor belt on both sides of the driving force suffered an imbalance
  As shown in Figure 1, the conveyor belt on both sides of the driving force on the size of

inconsistent, A, side by the driving force for the F1, B-side by the driving force F2, F1

than the F2, then the conveyor belt will run tend to A side.
  Lead to the uneven belt on both sides of many factors:
  The tensioning device of a belt conveyor installation error led to the conveyor belt on

both sides suffered tension belt running side by an inconsistency, improper install or

adjust the tensioning device is the most basic reasons for the belt on both sides of uneven

force.
  (b) the conveyor belt joint is not straight due to deviation. Partial or belt of the belt

vulcanizing Connector itself is not straight, resulting in uneven belt on both sides of the

tension belt to the tension side of deviation, not straight at the belt connector or belt

deviation is the most serious.
  c belt slack caused by the deviation. Con veyor belt in the running for some time, due to

stretch the belt permanent deformation or aging makes the tension of the belt down belt

slack, resulting in uneven belt internal stress distribution will cause the belt varying

degrees of deviation phenomenon is
  (d) deviation of material distribution inhomogeneity. Not deviation belt idling heavy-duty

operation on the deviation, indicating uneven distribution of material on both sides of the

belt. This deviation is most common in the actual use of the belt conveyor, the material is

uneven distribution of material whereabouts of the orientation and position is not correct

due to the mineral aggregate is biased to the left side of the belt to the right deviation;

and vice versa.
  (e) drum roller on both sides of the belt friction imbalance, uneven guide trough on both

sides of the rubber sheet pressur e caused by the driving force and resistance of the belt to

run on both sides of inconsistent, causing the belt deviation o
  (f) roller, roller sticky material caused by the deviation. Belt machine after running for

some time, because the material has a certain viscosity, some will stick to the dip in the

roller and roller, making the drum or roller local diameter becomes larger, causing the

uneven belt tension on both sides, causing the belt to run biased. Deviation due to this

factor generally occurs in the short-distance belt conveyor.
  1.2 conveyor belt by the lateral force
  The conveyor belt by the roller or rollers to produce the lateral force F resulting

deviation.
  Drum roller installation location is not correct, the belt will be at run time the lateral

force, shown in Figure 2. Carrying idlers v ertical error of the installation location and

the center line of the conveyor or roller axis with the center line of the belt conveyor

vertical error is too large, causing the belt to the side of the bearing segment deviation.

Bend pulley, idler installation position deviation of the most serious, and regardless of

the bearing segment return segment more forward deviation of the lighter. But the drive

roller tilt caused by the deviation will make the deviation more and more serious.
  Rack deformation caused by the deviation. Rack skew skew and the rack on both sides of the

rack centerline level of tilt, both cases will cause the belt by the lateral force,

resulting in a serious deviation, and it is difficult to adjust.
  In addition, the mechanical vibration of the belt conveyor in the run-time is unavoidable,

the belt run, the faster the vibration the greate r the result of the belt deviation. Belt

conveyor, roller runout caused by vibration of the belt deviation the greatest impact.
  Belt Running common approach
  For the phenomenon of deviation of the belt machine, you need to take appropriate measures

to adjust the key is to eliminate the driving force imbalance and belt conveyor on both

sides suffered by the lateral force. Installation error caused by deviation, first of all to

eliminate installation error; connected re-belt connector reconnection; plastic deformation

rack, serious must reinstall. Deviation in the running, specific adjustments as follows:
  2.1 Adjust the roller group
  Belt conveyor, conveyor belt in the middle of the entire belt conveyor deviation when

taken to adjust the position of the roller group to adjust the deviation, in order to

facilitate the adjustment of the roller frame o n both sides of the mounting holes are

drilled growth Kong. The specific methods shown in Figure 3, the conveyor belt biased side

of the A side of the roller group toward the belt running direction forward or backward in

the B-side of the roller group. This method can eliminate the mineral aggregate distributed

unevenly \\\\ vibration caused by the Belt Running rack skew.
  2.2 to adjust the drive pulley and bend pulley position
  Adjustment of the roller is an important part of the Belt Running adjusted. The axis of

the installation location of all roller belt conveyor must be perpendicular to the

centerline of the length of the belt conveyor direction, if the skew too large will

inevitably occur deviation. Bearing of the roller conveyor to belt conveyor head drum, the

lateral deviation, the A side bearing seat should be moved forward or side B move backward,

the A-side of the relaxation of the conveyor belt or B side tensioning . Contrary to the

rear roller adjustment and the head drum. Due to the limited adjustment of the distance of

the drive pulley, normally, the axis line of the drive pulley to adjust to and perpendicular

to the direction of the belt conveyor length spiral tensioning device or hammer tensioning

device to adjust the position of the tail bend pulley bearing. This method can effectively

eliminate belt slack and belt rack skew deviation.
  2.3 Installing the aligning roller group
  Conveyor belt deviation is often used in the entire central belt conveyor installation

aligning roller group anti-migraine, anti-migraine principle is the use of the roller in the

horizontal plane rotation block or produce lateral thrust belt automatically to adjust the

belt deviation to the heart of the purp ose of Generally shorter when the total length of the

belt conveyor or belt conveyor run in both directions using this method is more reasonable,

because the shorter belt conveyor deviation and not easy to adjust. Long belt conveyor best

use of this method have some impact, because the self-aligning roller group will belt life.
  2.4 tension adjustment at the
  Tension in the form can be divided into: Heavy Hammer tension (including the tail heavy

hammer tension and Central hammer tension), the mechanical tension (usually spiral

tensioning). Two of the hammer tension at the upper bend pulley other than perpendicular to

the direction of belt length should also be perpendicular to the vertical line of gravity,

which is to ensure its axis centerline level. When using the spiral tension, the two

tensioning roller bearings should be accompanied by translation, to ensure that the

perpendicular to the longitudinal direction of the roller axis with belt. Similar to the

adjustment method and the roller at the adjustment of the belt deviation.
  2.5 reproduced point blanking location of the belt deviation impact of adjustment
  Blanking bit of the point of the material reproduced in the belt conveyor system, and

placing a great impact on the deviation of the belt, two belt conveyor in the vertical

direction of the horizontal projection greater impact. Usually should be considered

reproduced the relative height of the point up and down two belt conveyor. The relative

height of the lower, the greater the material of the horizontal velocity component, the

greater the lateral impact of the lower belt, at the same time the material is difficult to

center. Skewed so that the material on the belt cross section, eventually leading to the

conveyor belt deviation. If the material to the right, then the belt deviation to the left,

and vice versa. Permit conditions during the installation process should be possible to

increase the relative height of the two belt machine. At the same time, parts of the shape

and size of the upper and lower funnel, the guide trough should be carefully designed.

General guidance for the width of the trough is about 2/3 of the belt width is more

appropriate. In addition, in order to reduce or avoid the belt deviation increase block

plate blocking material, changing the orientation and position of the whereabouts of the

materials.
  3 Conclusion
  By several common anti-partial correction for the deviation of the belt conveyor reason

analysis, the application of the above method makes the belt obvious deviation or downtime

due to the deviation caused by the phenomenon significantly reduced. Effective anti-migraine

correction technology not only can protect the belt conveyor, conveyor belt service life and

the production of port cargo handling efficiency.
Conveyor machine deviation analysis and anti-biased measures.