Six Inevitable Problems of Concrete Mixing Plant
1.Cement scales are not accurate
The failure of the performance of the weight of the calibration can be displayed after the correct value, after unloading the number is not zero, clear and then load the weight of a large number of changes, but check the sensor resistance in the normal range, and the instrument no problem.
Analysis of the reasons may be: transport with a fixed scale frame angle iron is not removed; pressure head and pressure plate at the card; scale body with the outside world to interfere with each other; 3 sensor models do not match;
The method of handling the concrete mixing station is: if the angle iron of the fixed scale frame is not removed, it should be removed in time. If the indenter or the pressure plate is issued, it should be dealt with in a timely manner so as to be smooth and unimpeded; if the scale body is interfering with the outside , Should be timely isolation; if the three sensor models do not match, should replace the model of the same sensor; if the material partial load, should be adjusted.
2. Aggregate hopper unloading door without material opening and closing difficulties
The failure of the performance of the cylinder is slow and weak, but check the mechanical parts of the unloading door without friction, stuck phenomenon, and the solenoid valve, the cylinder is no leakage phenomenon.
Analysis of the reasons may be: poor airway, such as the gas source of the triple air filter separator is dirty, resulting in poor airway, so that the unit time to reduce the flow of gas, resulting in slow cylinder activity; silencers too dirty Cylinder action when the rod and rodless cavity pressure becomes smaller, resulting in slow cylinder action.
Treatment of concrete mixing station failure method is: If the air is poor, should be promptly cleaned or replace the filter; if the muffler is too dirty, should promptly clean up the muffler.
3.The outlet is not expected
The fault is shown as the contactor in the contact, the motor clockwise rotation, the child screw conveyor discharge port is not expected, a little longer air switch will trip; the air switch is turned on after the start of the motor is still tripping, observe the powder No solidification phenomenon.
Analysis of the reasons may be: the machine is reversed; air switch damage; mother machine motor wiring may have a poor contact.
If the air switch is damaged, it should be replaced. If there is a bad contact between the motor and the motor, it should be checked and handled. If the air conditioner is damaged, it should be replaced.
4.Stirring shaft "stuffy car"
The failure of the performance of the mixing console in the mixing mortar, the stirring shaft rotation difficult, or even stop.
Analysis of the reasons may be: serious overload, material hoop shaft; artificial misuse caused by secondary feeding; weighing are not allowed; stirring blades or side blades and tank wall gap is large, there are foreign bodies into the stuck; voltage is too low; Set the error.
The method of handling concrete mixing station is: If the material is hoisted, the material hoop shaft should be adjusted and the stirring capacity should be adjusted to clean up the solidified mortar in time. If the material is caused by misoperation, the excess material should be removed and operated according to the process. If the pressure is too low, if the pressure is too low, if the pressure is too low, if the pressure is too low, if the pressure is too low, To re-check the line voltage; if the parameter is set incorrectly, should carefully check the corresponding ingredients and timely correction.
5. The host unloading door can not be opened
The failure of the performance of the mixing station when the automatic work, the host unloading door can not open, stirring is completed when the discharge indicator light does not shine.
Analysis of the reasons may be: unloading door and sealing plate between the foreign body or accumulation of material; gas system pressure, cylinder leakage or oil mist damage; solenoid valve and the wiring between the relay off, virtual connection or relay damage; Solenoid valve coil burned or spool stuck; time relay damage, resulting in PLC without normal input signal. Treatment of concrete mixing station failure method is: If the discharge gate and sealing plate between the foreign body or accumulation of material, should clean up foreign matter, accumulate and rinse the discharge door; if the gas system pressure is insufficient, the cylinder leak or oil mist damage , Should check the oil mist, joints, cylinders and other parts of the damage; if the solenoid valve and the wiring between the relay off, virtual connection or relay damage, should check the relay contact output and wiring, if necessary, replacement; if the solenoid valve coil Loss or spool stuck, should replace the solenoid valve; if the time relay is damaged, it should be replaced.
6. Conveyor belt deviation
The fault performance for the three cases: First, the conveyor belt in the case of no load and load to the same side of the deviation, that is, the conveyor belt centerline lateral deviation, the conveyor belt to the side of the material less; Second, the conveyor belt left, Right and no fixed direction; Third, the conveyor belt conveyor in the middle of the conveyor belt deviation. Foundation uneven, flat roller stickers, grooved roll left and right imbalance and the main, passive roller adjustment unbalance will cause the conveyor belt deviation. If the conveyor belt in the case of no load and load to the same side of the deviation, indicating the belt on both sides of the tightness is not the same or uneven rack.
At this point, the rack base should be the first leveling, remove the flat roller on the sticky material, adjust the tension screw or counterweight. If the conveyor belt left and right deviation without a fixed direction, then the conveyor belt relaxation, should adjust the tensioning mechanism. If the conveyor belt is biased in the middle of the conveyor, it can be corrected by adjusting the position of the roller group. If the conveyor belt is biased to one side, the side roller group should be moved in the direction of the conveyor belt, The side roller group is moved backwards (or the other side roller holder is properly raised). The return roller group is the same as the carrier roller group. For the longer conveyor belt conveyor system, adjust the roller group is very effective.
The adjustment of the drum is an important part of the adjustment of the conveyor belt, and the installation position of the drum must be perpendicular to the center line of the conveyor direction. Otherwise, the deviation will occur. As shown in Figure 2, if the conveyor belt to its right side deviation, should be the right side of the bearing seat forward (or the left side of the bearing seat back); if the conveyor belt to the left side of the roller deviation, then Move the left side bearing seat (or the right side bearing seat rearward).
If the conveyor belt relative to the moving roller deviation, adjust the method and the active roller just the opposite.
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