Food conveyor belt deviation and slip treatment

There are many reasons for deviation , to be handled differently depending on the cause .
First : Adjust carrying idlers .
Second : Install Spherical roller group .
Third: adjust , adjust the belt tension of the tension at the conveyor belt deviation adjustment is a very important part.
Fourth : Adjust the position of the drive roller and the idler pulley , drive roller and redirecting roller adjustment is an important part of the belt deviation adjustment .
Fifth : two-way run Flour Milling Equipment deviation adjustments.
Belt slippage approach:
First: slip tensioning screw or hydraulic tensioning belt tensioning machine or hydraulic tensioning spiral conveyor belt tensioning adjustable stroke occurs when slipping to increase tension . Sometimes, however, has enough tension stroke , permanent deformation of the belt occurs , this time period may be re- vulcanized belt truncated .
Second : When using a nylon belt tensioner stroke or EP is to require a longer trip is not enough when it can be re- vulcanized or increase tension trip to resolve.
Third: hammer belt conveyor belt tensioning slip tensioning belt conveyor using hammer device can be added when the belt slipping counterweight to solve, adding to the belt does not slip up . But should not be added too much, so that the belt tension is exposed to unnecessarily large decrease belt life .

Belt conveyor Troubleshooting and preventive measures

A Belt Conveyor common faults and

( 1 ) conveyor belt does not turn : after starting the motor idling conveyor drive roller slip , not start up , this failure is due to insufficient belt tension , tension device is not adjusted , the conveyor belt is too long, heavy start , the conveyor belt Last heap of coal wait causes.

( 2 ) conveyor deviation : Deviation reason is in operation generating a lateral force , lateral force generated following reasons : Conveyor loading biased side , rather than mounted on the center position ; idlers and rollers installation is not perpendicular to the center axis of the conveyor ; fuselage height rope inconsistent ; conveyor belt joint straight, not straight ; unloading roller position is not adjusted ; tail rollers, guide rollers did not adjust the belt can cause deviation .

Deviation modulation are generally carried out belt conveyor operation , adjustment to the attention of the belt running direction and the deviation direction , if the belt deviation to the right , on the side where the belt starts moving in the direction along the conveyor belt rollers run Right shaft , or along the transport direction of movement of the left idler shaft , so that the left end of the roller is slightly tilted forward, the adjustment to adjust a few more rollers, each roller is less tune some , excessive adjustment belt will be in the other direction deviation, adjust the belt to the left deviation method described above, is an adjustment in the opposite direction ; belt deviation when it occurs in the guide roller , tail roller , unloading roller , adjust the headstock , tail rack side rail and bolts before adjustment bolt to loosen some of the ends of the roller shaft to facilitate adjustment Fluting machine, the adjusted to tighten , having a good deviation roller .

( 3 ) Belt Easy Disconnect: This is caused by the belt tension is too large , the joint is not solid, poor quality belt buckle , belt use for a long time , and poor quality of maintenance reasons, is to tighten the tensioning device to reduce tension replace them with new belts and strengthen the quality of maintenance .

( 4 ) Reducer abnormal sound : This is caused by excessive wear of bearings and gears gap is too large or snail shell stable Sisong moving cause, treatment is to replace the bearings, adjust gap or replace the whole gearbox overhaul .

( 5 ) excessive heating gear : This is due to too much oil , cooling performance is poor, reducer buried coal caused by the source , treatment method is to adjust the oil , remove the source of coal .

( 6 ) gear oil spill : damage due to seals , combined with uneven surface reducer casing , Counterpart bolts are not tight, approach is to replace the seals , tighten the joint surface and each box bearing cap bolts.

( 7 ) roller does not turn : The reason is roller bearing damage , roller seals on both sides into the coal , the block does not turn, so that the roller shaft bent by excessive force . Approach is to replace the rollers, and repair , reducing the loading and unloading point elevation , or loading and unloading points use shockproof Care roll .

Second, the failure to prevent belt conveyor measures

( A ) To ensure that the conveyor work, in addition to daily general repair and maintenance , but also pay attention to the daily inspection, periodic maintenance, repairs and maintenance to improve quality .

( 2 ) to improve the expertise of maintenance personnel , proper operation of belt conveyors, to ensure stable operation of the conveyor .

Belt conveyor maintenance

Belt Conveyor, also known mainly from the rack, conveyor belts , belt roller, tensioning equipment, transmission equipment and other components. Body is made of high quality steel plate convergence , by the difference between front and rear legs constitute irregularities rack , the plane was definitely skewed viewpoint . Rack is equipped with a belt roller , roller , etc., for the femoral artery and the supporting conveyor belts . There geared motor drives and electric drum drive both methods.

1 the operation of the belt conveyor
 2 To view the conveyor before shutdown , there is no obstacle to endanger conveyor belt . If there is , to remove obstacles to ;
3 before shutting down the power to investigate is not normal , if necessary, to carry out measurement allocation to ensure that the needs of normal voltage equipment ;
(4) If the device is normal by the view , Fluting machine can shut down operation ;
 Switch the order of attention
 a. shutdown sequence : Close the control box power switch ( power indicator lit ) → engine start button → the ratio control rotary switch to the "ON" position → gradually rotating speed control knob to the desired speed scale . Make uniform operation ; Do not use beyond 1500rpm scale .
 b. shutdown sequence : ratio control in gradually rotating the knob back to the " 0" position → be flat conveyor will stop ratio control rotary switch to the "OFF" orientation → closed ignition switch and power switch .

Conveyor belt installation and maintenance

First, the startup and shutdown
Conveyor generally be started in an unloaded condition. By installing several units in the conveyor belt should be used when you can lock the starter to the control room through a certain order to start and stop. In addition, in order to prevent incidents, each conveyor should be set in place to start or stop buttons can be individually stopped Renyiyitai. In order to prevent the conveyor belt for some reason is longitudinal tear, when the conveyor is longer than 30m, the length along the conveyor, should be spaced a certain distance (e.g. 25-30m) to install a stop button.
Second, the installation of belt conveyor
Belt conveyor installation is typically carried out according to the following stages.
1 Install Belt Conveyor rack rack rack installation is started from scratch, and then install the sections sequentially intermediate frame, the final installation of the tailstock. A mounting rack, first to the entire length of the conveyor centerline pulling, due to keep the conveyor belt center line in a straight line is an important condition for the normal operation, so the installation of the rack sections, must be aligned with the centerline, but also put on airs leveling the rack on the centerline of the allowable error per meter captain of ± 0.1mm. However, the entire length of the conveyor frame centered on the error should not exceed 35mm. When all the single install and pinpoint can then be connected to each block.
2 Install drive unit mounted drives, you must pay attention to the belt conveyor belt conveyor drive shaft and perpendicular to the centerline, the width of the drive roller conveyor centerline central and coincides with the axis of the shaft line reducer parallel. Also, all shafts and rollers should be leveling. Axis horizontal error, according to the width of the conveyor, allowing the range of 0.5-1.5mm. Driving means installed at the same time, the tail wheel, etc. can be mounted tensioning device, the tensioning device of the axis of the drum, should be perpendicular to the centerline of the belt conveyor.
3 Install the rack rollers, gear and tensioning device after installation, you can install the upper and lower idler roller frame, so that the belt has a slow change to the curved arc, bending roll cage segment prop prop pitch as normal roller frame pitch 1/2 to 1/3. Idler installation, you should make it flexible rotary light.
4 belt conveyor belt in order to ensure the final pinpoint idlers and rollers are always in the center line of the operation, installation rollers, racks and rollers must meet the following requirements:
1) All rollers must line up parallel to each other and keep the horizontal level.
2) All the rollers are arranged in rows parallel to each other.
3) frame supporting structure must be linear, but keeping the horizontal level. To this end, the drive roller and roller frame after installation, should the centerline and the horizontal conveyor for final alignment.
5 is then fixed on the basis of the rack or floor. After a fixed belt conveyors can be fitted to the loading and unloading devices.
6 hanged hanged conveyor belt, the first shop in the strip conveyor idlers on load segments, Wai hold after the drive roller, and then deposited in the heavy segment on roller. Let hanging strips of use 0.5-1.5t hand winch. Connecting strip under tension when the roller moves the tensioning device shall limit position of the car and screw tensioning device To pull the gear shift direction; while picking up tight vertical move to the top of the drum unit to make . In previous belt tension should be installed reducer and motor, tilt conveyor confidential installed brakes.
7 belt conveyor installation, the need for idling test machine. In the idling test machine, pay attention to whether the running belt deviation phenomenon, driven part of the operating temperature, roller during operation activities, cleaning device and the guide plate in contact with the belt surface rigor, etc., while make the necessary adjustments, the components are normal after the operation can be performed with a load test machine. If a spiral tensioning device, with load test machine, but also once again its tightness adjustment.
Third, the maintenance of belt conveyors
To ensure reliable operation of belt conveyors, the most important is to detect and eliminate possible failures. This operation must always observe the work of transport, such as abnormal should timely manner. Mechanical workers should be regular inspections and check for any situations requiring attention or parts, this is very important. For example, a roller, does not seem very important, but a high-speed conveyor belt worn materials may soon put its shell worn out, the emergence of a blade, the blade could seriously damage an expensive belt. Workers trained or experienced staff to detect impending accident and take preventive measures. Belt conveyor belt conveyor costs in the entire account for a large proportion. In order to reduce the cost of replacement and repair belt, must pay attention to the operator and maintenance personnel for the operation and maintenance of conveyor knowledge training.

Accident Analysis and Prevention Belt

Reason
1.1 cause fire accidents
Underground mine Belt Conveyor is mainly fire-prone areas, because of its sudden, rapid development, pose a threat to the underground workers, and even induced due to the spread of fire and gas explosion is possible. Result in a fire accident was caused by the ignition source has enough calories to make tape burn. Skidding accidents are a major factor in generating enough heat, tape slippage is due to loose or tape jam large load caused by the tape tensioning device due to loose tension force generated by the elastic elongation of the tape is too small and too large; large load First, because of heavy start, the second is due to load is too large, three is the tape and active roller, driven roller idler friction between too small, such as tape inside surface water or oil, the driven roller bearing damage or childcare roll damage; tape jammed tape is mainly buried in coal or in the mud, so that the tape can not run. Another electrical equipment sparks, electrical short circuit may also cause the conveyor fire.
1.2 belt run cause of the accident
Runtime conveyor belt deviation is the most common faults. Deviation accidents occur frequently, it will affect the life of the conveyor, severe outage occurs or is likely to result in personal injury or death. Causing belt run three main reasons: First, the device itself aspects, such as the outer cylindrical drum larger error, roller rotation is not flexible, proactive and driven roller drum axis parallelism error is larger, etc.; Second, installation and commissioning aspects, such as roller, roller, rack installation does not meet regulatory requirements, in addition to vent coal biased position of the mouth, causing the tape to make partial load deviation; Third, maintenance, mainly due to the cleaning is not timely, transport Machine Drum Machine roller-stained dust, resulting in local diameter Ambassador belt run.
1.3 Tear cause of the accident
Tear tape main reasons: First funnel badly worn, resulting in waste rock and coal gangue direct hit tape or card tape and other items caused by tearing; Second, serious deviation is scraped tear tape; three tape joint strength is too low or because the load is too large to make tape joints broken.
Prevention
2.1 Fire accident prevention
1) using fire-retardant tape, even in the event of fire, it will not be able to control the fire rapidly.
2) strengthen the maintenance of electrical equipment, to prevent fires caused by electrical accidents.
3) strengthen management, to keep the roadway clean, tape no floating coal, water, no oil, no debris, nose, tail no heap coals. Improve the quality of operation and maintenance personnel to maintain good running condition conveyor.
4) conveying confidential installation inspection and monitoring devices, such as drive rollers and driven roller temperature monitoring devices, smoke alarms and fire in the event of an automatic sprinkler system.
2.2 Deviation accident prevention
1) confirmation by the state purchase of qualified products, avoid the lack of precision equipment manufacturing belt deviation caused by an accident.
2) Install the installation process to focus on the dimensional accuracy:
a. installation tape found at the deviation in the drum, the drum should be corrected and equal degree of levelness, drive pulley, steering cylinder installation requires its width tape centerline coincides with the centerline of not more than 2mm, its axis line and tape The vertical center line of the drum is no more than a fraction of the width, the horizontal roller shaft of not more than 0.3/1000.
b. If you find that tape to the side of the no-load total deviation should be adjusted idler bracket.
c. If you find no deviation tape at no load, and heavy load to the side of the deviation, indicating that the tape appeared partial load, coal hopper vent should be adjusted to the position.
3) strengthening routine maintenance:
a. timely removal conveyor rollers, roller, splice at other major parts of the dust, and prevent the roller, roller-stained dust lead belt run.
b. timely adjustment of tape running deviation phenomenon occurs, promptly check the tape edges and joints wear, identify problems and timely replacement and repair.
4) Install belt run the monitoring device, once the belt run off the alarm signal to alert maintenance personnel to take action.
2.3 Tear accident prevention
A) timely repair worn funnel, avoiding direct coal gangue and pound the tape.
2) the timely processing of deviation fault, not tear tape.
3) Set the tape longitudinal tear monitoring devices, found fault timely manner.