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Failure and solution of concrete mixing station

Author: admin Release time: June 17, 2017 Number of visits:

Serial number

Fault phenomenon

Cause of failure

Exclusion method

one

It is difficult to open and close each door of batching machine

1. The pressure of air supply system is too low

2. The running pin shaft is stuck

3. The discharge port is deformed

4. Stuck by big foreign body

1. Adjust the air pressure to 0.6MPa

2. Add lubricating grease

3. Repair the discharge port

4. Remove foreign matters

two

The weighing accuracy is decreased or inaccurate

1. The discharge door switch action drops

2. The discharge door is too large

3. The sensor is damaged

1. Remove the discharge door fault

2. Adjust the bolts on the side of the discharge door to reduce the discharge door

3. Replace the same type of sensor

three

The feeding speed of screw machine is slow

Failure of arch breaking device in silo or low air supply pressure

Check and repair the arch breaking device, adjust the pressure reducing valve in the air supply circuit to maintain the air pressure between 0.1 ~ 0.3MPa

four

There is no oil discharge from the lubricating pipeline

Lack of oil (1)

2. The lubricating oil (grease) does not meet the requirements

3. The lubrication pump is damaged or wiring is improper

4. The passage is blocked due to foreign matters in the grease or hardening

1. Add lubricating oil (grease)

2. Change lubricating oil (grease)

3. Check the power supply, control circuit, motor or replace the lubricating oil pump

4. Remove the lubricating oil (grease) in the cylinder and pump, and add mechanical oil to flush and dredge

five

The mixing blade and lining plate are seriously worn

1. Normal wear and tear after long-term use

2. Use unqualified large-size aggregate and run it in the mixing drum

3. The metal produced during installation and maintenance enters the main engine

4. The clearance between blade and liner was not checked and adjusted as required

1. Replace worn blades

2. Ensure the use of qualified aggregate

3. Check and clean the metal objects in the host

4. Clean the mixing drum frequently, check the blade wear, and adjust the clearance between the blade and the liner plate or replace the blade and liner plate as required if necessary

six

There is no water in the pipeline of water supply system

1. There is air in the water pump

2. The water pump motor is broken

1. Open the exhaust valve on the water pump to drain the air in the pump

2. Repair or replace the water pump motor

seven

There is no admixture in the pipeline of admixture system

1. There is air in the admixture pump

2. The motor of additive pump is broken

3. The valve of additive pipeline is not opened

4. The admixture has been used up

5. Blocking of additive crystal precipitation

1. Open the exhaust valve on the admixture pump to drain the air in the pump

Repair the pump or replace the motor

3. Open the valve of additive pipeline

4. Supplement additives

5. Clean and dredge the additive pipeline

eight

Hopper leakage

The lining plate of the hopper is worn and the bucket body is worn

Repair or replace the hopper body and replace the hopper liner

nine

PLC cannot communicate

1. Poor contact of communication line or communication network connector

2. Communication or expansion module is damaged

1. Check the communication line or connector

2. Replace the communication or expansion module

ten

Digital display meter random code

There is something wrong with one of the digital meters

Step by step investigation and replacement

eleven

Phase loss

1. Phase loss of external power supply

2. Contact of contactor or circuit breaker is burnt out

1. Check the external power supply

2. Replace the contactor or circuit breaker

twelve

Circuit breaker trip

1. The current of circuit breaker is not set well

2. The contact of contactor is burnt out, resulting in phase loss

1. Setting current

2. Replace the contactor

thirteen

Frequent starting of air compressor

1. Frequent startup

2. No shutdown

1. Air leakage in gas pipeline

2. Air compressor problem

fourteen

The concrete outlet door cannot be fully closed

The running diagram shows that the concrete door can not be fully closed

The position of the proximity switch of the concrete outlet door is wrong. Adjust the proximity switch

fifteen

Treatment of stuffy pot

The mixing material in the mixing machine exceeds the capacity of the main machine

1. Open the concrete outlet door

2. The main engine starts to △ start

3. Jog the mixer until all materials are discharged

sixteen

Prevention of axle holding

The solidified concrete is wrapped by mixing shaft

Clean the mixing machine in time

seventeen

Alarm when sand or stone scale door is not closed

If the sand or stone scale door on the operation diagram is not closed, the scale door will flash and alarm

1. The scale door is actually closed, the installation position of the travel switch of the scale door has moved or the cylinder stroke has changed

2. Adjust the position of travel switch of scale door or connect one travel switch in parallel

eighteen

1. The difference of sand or stone fall is too large

2. The measurement error of sand or stone is too large

The door opening limit bolt is not adjusted properly

Opening limit bolt of regulating bin door

nineteen

The drop or error of admixture or water is too large

The range of admixture or water is not adjusted well

Suggestion: the precise weighing range of water is 10kg, and that of admixture is 4kg

twenty

Data loss

1. Manual intervention in automatic operation; 2. Incorrect setting of common parameters

1. In automatic operation, manual intervention will be conducted after the scales are full

2. The feeding time of common parameter setting must be greater than "1s"

twenty-one

The program stops running during automatic production

1. The scales are full, but the batching machine is not feeding

2. If there is material in the intermediate bin, the lower limit value of closing the intermediate bin door is too small

Increase the lower limit of closing the intermediate bin door

twenty-two

Communication is normal, there is no weight display or weighing is not allowed on a scale, and the weighing module SF is on red light

1. Measure exc + / - no 10V (DC), short circuit of load cell or intermediate junction box or damage of weighing module; remove sense + / -, SIG + / - wires on weighing module, measure exc + / - no 10V, weighing module is damaged

2. If sense + / - no 10V, the wiring between the middle wiring and the weighing module is open circuit; the load cell is damaged

3. Measure the sig + / - voltage of each load cell, and the value should be between 4-7mv. If one of them is too large or too small, the load cell will be damaged

twenty-three

Continuous measurement of admixture

After feeding, the contact of the limit switch in the pneumatic butterfly valve of the weighing door was damaged

Replace the limit switch auxiliary contact

twenty-four

The mixing time is stopped at 10s

1. Some materials have not been put into operation;

2. The weight of a material on the scale exceeds the upper limit set by the program

twenty-five

The camera has no image display

1. Poor contact of video wire connector

2. The camera is damaged

3. The monitor is damaged

1. Re weld the video wire connector

2. Replace the component

3. Replace the component

twenty-six

The lamp is damaged

1. The components are damaged during transportation

2. Is the working voltage normal

1. Replace the component (power quality inspection has been conducted before delivery)

2. Adjust the output voltage of transformer

twenty-seven

"Invalid parameter" will pop up

The problem of procedure itself

Turn off the program, restart it, and change the production volume to the previous one

twenty-eight

Powder scale cannot be closed in place

1. The limit sensor is damaged or deviated;

2. The coil of solenoid valve is burnt out;

3. The valve is damaged

1. Replace or adjust the limit;

2. Replace the coil;

3. Replace the valve

twenty-nine

The intermediate warehouse cannot be closed properly

1. The time when the aggregate is fully put into the intermediate bin or the feeding delay time is not adjusted properly

2. The position of proximity switch is not adjusted properly

3. There will be running in period when the new machine is used

1. Increase the time of aggregate entering the intermediate bin or delay time of feeding

2. Adjust the position of proximity switch

Strengthening the maintenance of new machine

many

The water on the scale is constantly decreasing

1. The valve limit of water scale is damaged and the door is not closed, but the computer shows that it is closed.

2. The inner sealing rubber ring of the valve falls off or is damaged.

1. Replace the limit or adjust it;

2. Replace the sealing rubber ring or reassemble it

thirty-one

The cylinder moves slowly

1. Insufficient air pressure or air leakage in air circuit;

2. Problems of solenoid valve or coil;

1. Check the air circuit, the air compressor until the air reaches the required air pressure;

2. Replace the solenoid valve;

thirty-two

Computer crash

1. Enter the system and die;

2. Can't start the machine

1. Replace the system;

2. Replace the motherboard

many

Alarm of mixing machine

1. The sensor is loose;

2. High oil temperature or lack of oil

1. Re install the sensor;

2. Stop the machine for inspection, add oil or change oil

thirty-four

The level indicator lights up for a long time

It is because the level gauge is covered by cement blocks and short circuited for a long time

Remove the level gauge and clean it

thirty-five

The vibrator does not vibrate

1. The circuit breaker trips

The vibrator is damaged

1. Check the circuit breaker and check the circuit;

2. Replace the vibrator

many

No broken arch of powder silo

1. The broken arch solenoid valve is damaged

Line fault

3. The intermediate relay is damaged

1. Check or replace the solenoid valve;

2. Check the circuit

3. Check or replace the intermediate relay

thirty-seven

The dust collector of the main engine does not work or has no effect

1. The dust collecting and dedusting pipelines are blocked and the dust collecting motor is damaged

2. The filter element is damaged

1. Clean the pipeline

2. Check or replace the motor and replace the filter element

thirty-eight

The effect of dust collector on top of powder tank is poor

The internal vibration of dust remover is damaged

2. The filter element has not been cleaned or damaged for a long time

Vibration machine or replacement

2. Clean the filter element or replace it

thirty-nine

The main engine does not add butter automatically

1. The automatic refueling motor does not work

The oil pipe is blocked

1. Check the motor and circuit

2. Clean the oil delivery pipe