Three common faults in concrete mixing stations and their solutions

1. Cement scale weighing inaccurately

This fault shows that the correct value can be displayed after adding weights for calibration, but the numbers do not return to zero after unloading. After clearing and reloading the weights, the numbers change greatly, but check that the sensor resistance value is within the normal range, and there is no problem with the instrument.

Analyzed reasons may include: the angle iron fixing the scale frame for transportation has not been removed; the pressure head and pressure plate are stuck; the scale body interferes with the outside world; the three sensor models do not match; and the load is off-center when weighing materials.

The method to deal with the failure of the concrete mixing station is: if the angle iron fixing the scale frame for transportation has not been removed, it should be removed in time; if the pressure head or pressure plate is stuck, it should be dealt with in time to make it smooth and without resistance; if the scale body interferes with the outside world , should be isolated in time; if the three sensor models do not match, sensors of the same model should be replaced; if the material is unbalanced, adjustments should be made.

2.The discharge door of the collecting tank is difficult to open and close when there is no material.

This fault is manifested by slow and weak movement of the cylinder, but check that there is no friction or sticking in the mechanical part of the discharge door, and that there is no air leakage in the solenoid valve or cylinder.

The reasons may include: poor air path. For example, the air-water separator filter element of the triple part at the air source is too dirty, causing the air path to be unsmooth, which reduces the gas flow per unit time, thus causing the cylinder to move slowly; the muffler is too dirty. When the cylinder moves, the pressure difference between the rod chamber and the rodless chamber becomes smaller, causing the cylinder to move slowly.

The method to deal with the failure of the concrete mixing station is: if the air path is not smooth, the filter element should be cleaned or replaced in time; if the muffler is too dirty, the muffler should be cleaned in time.

3.No material is discharged from the discharge port

This fault is manifested as when the contactor is closed and the motor rotates clockwise, the material is not discharged from the outlet of the screw conveyor, and the air switch will trip after a short time; after closing the air switch, the motor still trips, and observe the powder No coagulation phenomenon.

Analysis of the possible reasons includes: the mother machine is reversed; the air switch is damaged; the mother machine motor wiring may have poor contact in one phase.

The method to deal with the failure of the concrete mixing station is: if the mother machine is reversed, just adjust any two of the mother machine motor wiring; if the air switch is damaged, it should be replaced; if one phase of the mother machine motor wiring is in poor contact, it should be checked and dealt with.