Common fault and treatment about mixing station

First, the concrete mixing uneven

Symptom:

Uneven concrete mixer discharged, while dry, while wet.

Cause Analysis:

Mixing time is too short uneven mixing, another mixer nozzle spray pipe is not installed correctly, the spray uneven concrete while doing more easily, while wet.

Process:

1, check whether the mixing time is too short (typically 30 seconds), such as the mixing time is too short mixing time may be extended.

2. Check the water pipe nozzles installed the order is correct, the correct order of the row of nozzles pump side of the minimum, maximum nozzle on the other side of the middle from small to large order evenly installed.

Second, aggregate weighing allowed

Symptom:

1, aggregate weighing is always normal.

2, aggregate weighing is always less than normal.

3, aggregate weighing for a little more than a while.

Cause Analysis:

Aggregate weighing errors and fine setting, the uniformity of the gap and unloading are closely linked. Fine set of data must be greater than the gap, otherwise fine setting signal has been output, drop signal has been issued to stop the discharge.

Process:

1, the aggregate is always ones, can pass notes large drop of solution. Large gap adjustment, the need to check its value is less than the fine set value, such as the gap is greater than the fine setting should be adjusted accordingly large fine set of values.

2, the aggregate is always less than normal, you can pass notes small drop of solution. After adjusting the gap is small, generally do not need to adjust the fine setting.

3, aggregate weighing a while for a little more, first check the uniformity of the discharge, the discharge port to check whether there is debris jam, and then adjust the settings and fine drop.

Third, the powder weighing allowed

Symptom:

1, powder weighing always the high side.

2, powder weighing is always less than normal.

3, powder weighing one will be more than a little.

Cause Analysis:

Factors associated with the powder weighing the difference of the set, feed uniformity, main negative impact of dust and other screw machine.

Process:

Always or always smaller ones can be corrected by adjusting the gap. When weighing unstable, check the feed screw machine uniformity (mainly to see the Powder container cutting is smooth) and processed. Also check the main line and the dust collector filter dust clogging.

Fourth, additive weighing allowed

Symptom:

1, additive weighing always the high side.

2, additive weighing is always less than normal.

3, additive weighing for a little more for a while.

Cause Analysis:

The main impact of the gap and the manual valve opening degree.

Process:

First adjust the gap, such as adjusting the gap after weighing the problem persists, put additives pipeline manual ball off small, and then adjust the gap.

Fifth, after weighing the powder weighing balance accurate meter readings gradually smaller

Symptom:

In the automated production process, the material powder metering hopper, said good after getting smaller.

Cause Analysis:

Discharge pneumatic valve mainly caused by loose relationship. The pneumatic butterfly strictly related factors: pneumatic valve assembly screw position limit position caused by improper shut valve itself is not in place, another valve at the outlet of sticky material will cause pneumatic valve off place.

Process:

1, first disconnect red hose associated with the pneumatic valve, check whether the material stuck on the valve, if so, the valve open state, steel brush to clean out the material.

2, the top wire position limit check valve is at the proper opening of the valve can be limited by adjusting the top wire.