Common fault and treatment concrete batching plant

One, powder feeding slow

Symptoms: screw conveyor feeding slowly, feeding for more than 2 minutes, and normal feed in under 20 seconds.

Analysis: factors affecting mainly powder under the tank material, and damage of screw conveyor. Manifestations of poor powder material powder bagging, powder pot outlet material caking and outlet butterfly valve open through small, insufficient material in powder cans, and so on. Spiral blade deformation and damage of screw conveyor is mainly not normal delivery.

Process:

1, open air arch-breaking devices.

2, check the powder tank discharge butterfly valve open and the butterfly valve is in fully open position.

3, check whether the powder pot outlet material caking.

4, check whether the spiral blade deformation, such as deformation of the removal correction or replacement.

Second, the belt deviation

Symptoms:

Belt conveyor in no-load or load operation, appears to run or a run one on the left and the right, causing leaking, abnormal wear and damage of concrete batch plant equipment, reduce productivity and affect the normal operation of the equipment

Analysis:

Tapes of the resultant force on the belt width is not zero or perpendicular to the belt width direction tensile stress caused by uneven. Because of the many factors that led to belt, conveyor design, manufacture, installation and commissioning started to solve, use and maintenance of belt deviation, such as adhesive tape on both sides of the tension does not like, adhesive tape on both sides of the gamut, roller frame and other equipment is not installed and vertical section of the superior belt running direction causes the belt deviation.

Process:

(1) adjust the tightening law

Tape is running, if in the case of no-load and overload the same lateral deviation, shows tape on both sides of the tension are not the same, the tightness of the left; if the tape was running around with no fixed direction, then the tape loose, adjust the tensioner.

(2) adjust the drum method

If the deviation of the belt on the drum Department shows cylinder installed under a horizontal, cylinder axial movement, or one end of the drum in the front end in the post. At this point, correction roller should be level and parallel.

(3) adjust the idler bracket (or frame) method

If the tape was unloaded when slanting to one side, you should run one side of the idler bracket moved forward along the belt running direction 1-2cm or idler bracket to the other side (or chassis) are properly raised.

(4) clear adhesive method

If stuck on part of the cylinder, roller materials will enable the diameter increases, causing the belt tension increases, resulting in misalignment. Clean adhesion of materials in a timely manner.

(5) adjust the gravity law

If the tape was running in case of no-load and overload when slanting to one side, tape has been contained in the note. Should adjust the location of hoppers or tape machine, which contains tape to prevent misalignment.

(6) adjust the tape method

Wear or tape if the tape edge joints are not parallel, inconsistent tension on both sides of the tape. Need to repair or replace tape once again.

(7) installation method of offset rollers

Conveyor installed on several groups of self-aligning rollers (roller or Groove roll) that can automatically correct the deviation phenomenon of tape. For example: when the tape roll appeared running and one small friction, should make that side of the bracket along the tape running direction moves forward, the other side is relatively backward, this time retaining rollers on one side of the belt will move after move, until returned to the normal position.

(8) installation spacing roller method

If the total tape slanting to one side, you can run one side of rack installed on the limited vertical roll so that tape can be coercive force reduction on the one hand, on the other hand edger can reduce the running side of belt tension, make tape to the other side.

Three, aggregates the feed door cards

Symptoms:

Ingredient feed pneumatic doors standing stones are stones stuck won't open.

Analysis:

Dosing station clearance doors and small pneumatic doors, large gap door clearance than the average stone size, so as to avoid blocking. Small gap door gap in 5~10MM, when 10MM stones below the card into the gap, to pneumatic door stuck. Ingredients stand use after a period of time, aggregate outlet wear, when you wear the gap to 20~30mm, at which point cards into larger stones into the gap, in the process of opening, stone is easy to stick (wedge), pneumatic doors could not be opened.

Process:

check the air gap and adjust to the appropriate value, as a result of excessive wear and cannot be adjusted to the proper value, then welded steel plate or steel at the entrance so that gap to a reasonable value.

Four, conveying powder expected when the tank, tank top taking ash

Symptoms:

Bulk cement truck in the powder tank pump ash, cement tank top with pink smoke.

Analysis:

Powder material conveying to powder material tank is through compression Air conveying, compression air put powder material sent to powder material tank Hou, through tank top dust machine filter row to air in the, as dust machine filter jam, is compression air cannot timely discharge and produced "hold pressure", dang pressure reached tank top security valve opened pressure Shi, safety valve open, compression air and powder material through safety valve row to atmosphere in the, produced take gray phenomenon. Another one that the level meter failed, powder filled to continue feeding, tank top taking ash can also occur.

Process:

1, check tank top dust filter and clean up.

2, if there is a risk of dust must be clean powder around the safety valve, avoid powders by wet lumps blocking valve.

3, as a result of the powder packed too full to take ash, you must check the level gauge and the material on the reliability of alarm.