Concrete Mixer Cleaning Precautions

In order to normal use of concrete mixer and extend its service life, after using the mixer should pay attention to cleaning work, the following we look under the cleaning concrete mixer Note:

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  • First, regular maintenance procedures for the maintenance of the project, such as cleaning, lubrication, refueling, etc.
  • Second, the concrete mixer before the first check the controller is good, after stopping the water and stones into the mixing tube 10 to 15 minutes for cleaning, and then clear the water and stones. If the operator is required to enter the mixing cylinder to clean, in addition to cut off the power and remove the fuse, and to lock the switch box.
  • Thirdly, it is forbidden to remove the concrete accumulated in the concrete mixer barrel with a sledgehammer, which can only be removed with a chisel.
  • Fourth, in the cold season, after the completion of the application of water cleaning concrete mixer drum and water pumps, water tanks, water pipes within the net put, so as not to water pumps, water tanks, water pipes and other frozen.

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Debugging Method of Concrete Mixer in Concrete Mixing Plant

Concrete mixer is the cement, aggregate and water mixed and mixed into a concrete mixture of mechanical and concrete mixer debugging problems in the use of concrete mixing plant is very critical in the process, a direct impact on the concrete mixing plant equipment can No normal operation. Concrete mixing plant is widely used in commercial concrete mixing, pipe piles, components, hydraulic, marine and other concrete concentration mixing sites, and according to different process requirements and the actual needs of the design and manufacture, so that each (sets) equipment with distinctive professional quality.


Debugging Problem of Concrete Mixer.
1, the concrete mixer of the various settings to be reasonable. Power supply voltage: the additional voltage of 380 volts, the error is ± 10%; motor and electrical components of the wiring can be reliable, the distribution box shell must be firmly grounded. Power supply zero line is necessary to be delivered to the distribution box on the wiring board N, all pipelines should be properly placed to prevent the operation crushed into the formation of trouble.


2, regular inspection items. Regular inspection of the concrete mixer of the gearbox and the smooth parts of the smooth oil can be sufficient; to regularly check the forced mixer mixer mixing motor, two axle rotation direction should be consistent with the direction of signs, such as the direction of the wrong, should change the power wiring
3, launched discharge organization, unloading door opening and closing should be accurate in place. Start the pump hanging water, the water supply system should work; according to the required concrete ratio to determine the amount of water supply, and conditioning the moment relay to the corresponding water supply time. Start mixing motor work.
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Introduction of the main characteristics of concrete mixing plant

Concrete is the main material of today’s construction, the use of this material for us to help the role is relatively large. In life we ​​often use concrete to the concrete mixing station when processing and mixing concrete. For this device, I believe we are in life there is a certain understanding, then the characteristics of this device have what?


The concrete mixing station is mainly divided into four parts: gravel feeding, powder feeding, water and admixture feeding, transmission mixing and storage. The whole body is made of steel structure. The high quality H-shaped steel is not only beautiful in appearance but also strengthened The concrete structure of the concrete mixing station strength, equipment, convenient installation, can be applied to a variety of complex terrain structure.
Good mixing performance, the device uses a spiral double horizontal shaft forced mixing host, not only the mixer is strong, for dry hard, plastic and a variety of concrete can achieve a good mix of mixing effect. And stir evenly, high efficiency.
The concrete mixing plant not only has excellent mixing host, but also has a variety of sophisticated accessories, such as screw conveyors, metering sensors, pneumatic components, etc., these components to ensure that the concrete mixing plant in the operation of a high degree of reliability, accurate measurement skills and Long service life. At the same time, the concrete mixing plant maintenance stations are equipped with station or check ladder, mixing station, and has enough space to control, stirring the host can be equipped with high-pressure automatic cleaning system, with a function of oil and over-temperature automatic alarm function, service.


Concrete mixing station is composed of mixing host, material weighing system, material conveying system, material storage system, control system composed of five major systems and other ancillary facilities of the building materials manufacturing equipment, the main principle of its work is cement cementing materials, Sand, lime, cinder and other raw materials for mixing, and finally made into concrete, mixing station, as the wall material into the construction and production. Since the concrete mixing plant has been put into use, it has played an important role in the construction and construction industry of our country. Of course, this is also determined by the superior characteristics of the concrete mixing plant itself.


Good environmental protection function, in the process of running the machine, powder handling are carried out in the full block system, the use of high efficiency dust collector / spray spray and other methods greatly reduce the dust on the environment pollution, while the concrete mixing station on the pneumatic system Exhaust and discharge equipment are used muffler device to effectively reduce the noise pollution.

Operation of concrete mixing station operation table

Concrete mixer station before starting to check the following eight aspects: limit switch is normal, there is no alarm on the computer running interface; concrete mixer began to ramp, flat belt; start mixing console; start mixing station source air pressure Machine pressure 0.7MPa after the pressure to meet the surrounding; please disable the automatic production of concrete switches, “prohibited specific” documents;


Concrete mixing station control system manually “switch to” automatic “; then open the emergency stop button switch, concrete mixing plant and then through the manual console power supply, PLC and instrument power display normal, open UPS, open the computer to check.
The control station of the concrete mixing station is equipped with an emergency stop switch, the key switch is in the closed state, and the patch panel inside the console is in the OFF state, and the power switch on the main chassis in the absence of any load is turned off (in the case of a load , When the power switch off the cabinet may lead to collapse.
In the concrete mixing station control system self-test Note: mixed control system operation is not skilled, please strictly follow the following steps. Make sure the computer input signal is normal. Open the silo bottom plate valve, admixture, feed valve, pump and inlet valve aggregate storage silo full of material, clear the host, the middle of each object needs to be carefully checked.

Common troubleshooting and solutions for concrete mixing stations

Concrete Mixing Station Troubleshooting:

First, the mixer main motor does not move
Symptom: Press the mixer on the console start button, the mixer does not start.
Analysis of the reasons:

  • 1, air compressor is not activated or gas supply system pressure is not reached
  • 2, stirring the host maintenance protection switch and the host with a key tight stop switch is not connected.
  • 3, the console on the tight stop switch is not reset.
  • 4, the host power switch is not connected.
  • 5, the host stop signal must be reset.

Process:

  • 1, check the compressed air detection signal (greater than 0.4MPa pressure signal) is sent to the PLC, that is, I8.0 whether there is signal. If I8.0 no signal, then check the air compressor pressure is greater than 0.4MPa, when the pressure reaches 0.4MPa or more, I8.0 no signal, then check the electrical contact pressure gauge adjustment is normal or damaged until I8.0 signal.
  • 2, check the mixing console maintenance switch switch signal is sent to the PLC
  • 3, check the console on the tight stop switch is reset,
  • 4, check the host power switch is connected.
  • 5, check the host to stop the button is reset

Second, in the automatic production process, the ingredients station said good after the material unloading
Symptom: In the automatic production process, one or more aggregate said in the measurement bucket, do not discharge, the system stops running.
Analysis of reasons:

  • 1, to be hopper door is not in place.
  • 2, weighing instrument does not discharge the output signal.
  • 3, the belt machine is not started.
  • 4, aggregate said fine door is not in place.
  • 5, aggregate must define the discharge order.

Process:

  • 1, check the hopper to be bucket valve is not in place or close the door, close the door, I6.7 signal.
  • 2, check the aggregate weighing instrument is unloading output signal, stone 1 discharge I0.4, stone 2 unloading I0.7, sand 1 unloading I1.5, sand 2 unloading I1.2.
  • 3, check the belt machine is started.
  • 4, check the aggregate of the fine door is closed in place, stone 1 fine closed door I8.2, stone 2 fine closed door I8.3, sand 1 fine closed door I8.5, sand 2 fine closed door I8.4.

Third, the oblique belt is not moving
Symptom: After the mixer is started normally, press the beveled belt start button on the console, and the oblique belt does not start.
Analysis of the reasons:

  • 1, the mixer did not start.
  • 2, oblique belt maintenance stop switch is not reset.
  • 3, oblique belt machine power switch is not connected.
  • 4, oblique belt machine stop button switch is not reset.

Reason and Corresponding Solution of Gas Supply Fault in Concrete Mixing Station

Concrete mixing station gas source failure and solution:
(1) air compressor failure are: check valve damage, piston ring wear serious, damage to the inlet valve and air filter blockage.
To determine whether the reversing valve is damaged, only in the air compressor automatically shut down ten seconds later, turn off the power, hand wheel to move a large tape pulley, if more easily turn a week, then check the valve is not damaged ; In addition, the anti-valve has been damaged; In addition, can also be from the automatic pressure switch below the exhaust port to determine the situation, usually in the air compressor automatically shut down after about ten seconds to stop the exhaust, If the exhaust has been stopped until the air compressor starts again, it means that the check valve has been damaged and must be replaced.


When the pressure of the air compressor is slow and accompanied by the phenomenon of oil, indicating that the air compressor piston ring has been seriously worn, should be replaced.
When the intake valve is damaged or the air filter is clogged, the pressure on the air compressor will also rise slowly (but there is no oiling). Check, the palm of your hand can be placed on the air filter inlet, if there is hot air to the top, then the inlet valve has been damaged, to be replaced; if the suction is small, the air filter is generally dirty, The filter should be cleaned or replaced.


(2) failure of the valve are: the pressure is not high, or the pressure rise slowly. Pressure is not high, often due to pressure spring breakage or diaphragm caused by the rupture, must be renewed; pressure rise slowly, generally caused by the filter was blocked, should be removed cleaning.


(3) pipeline failure are: pipe joints leak, hose rupture, condensate accumulation and so on.
Pipe joints leak and hose rupture from the sound up to determine the location of the leak, should be promptly repaired or replaced; if the pipeline is condensed with condensate, it should be drained in time, is characterized in the winter of winter condensate easy to knot Ice and block the air.
(4) Compression air handling components (triple body) failure: oil and water separator failure, pressure regulator and oil mist failure.
Oil and water separator failure is divided into, filter blockage, damage, the movement of moving parts of the valve is not flexible and so on. Work to always clean the filter, remove the oil and impurities in the sewage.

Installation of cement silos in concrete mixing stations

The concrete mixing station in the cement warehouse in the installation process precautions
(1) In the concrete mixing station, the ground bolts of the cement warehouse in the concrete mixing station are poured into the foundation pit. After adjusting the center line of the cement silo bracket and the centerline of the foundation, the above four flanges are adjusted on the same level (measurement method: the theodolite Or diameter 8-10 transparent plastic hose plus color water measurement method), you can choose the concrete pouring. Pre-pit pouring concrete grades should be higher than the base of concrete used in the winter construction, in order to shorten the duration, the use of concrete should be added early antifreeze. To be solidified concrete 5-7 days before the installation of cement warehouses, cement warehouse installation, the need for the use of theodolite on the cement body vertical measurement, the vertical degree of one thousandth of the height. To shorten the duration, the infrastructure can also be used to replace the anchor bolts with embedded parts to fix the cement bin or mixer.


(2) the installation of the mixing plant in the concrete mixing station: the mixer under the chassis of the appropriate appropriate pad, with the hinge will be connected with the host and the bridge, installed cement scale, water scale, additive scale, you can lift, measurement And adjust the host chassis, so that in a horizontal state, the center line of the legs and the center line after the center line can be filled with anchor bolts in the pit (or the base and the embedded parts of the welding).
(3) the installation of other parts of the concrete mixing plant: concrete mixing station in the host and the cement tank after the installation of the installation, you can install the screw conveyor, before lifting, check the lubrication point filling oil and grease, to be empty Test, find the problem in time to solve the installation of parts of the machine, according to the requirements of the base map in place, a small batching machine placed in a solid foundation pier can be on the surface, large batching machine requirements pouring anchor bolts, the mechanical part of the installation of the end , Check all the lubrication points of various equipment with lubricating oil (winter in winter to be replaced for low temperature conditions of lubricating oil) or grease, you can according to the instructions and electrical schematic diagram of the wiring and the empty running test.

Concrete mixing station to stop the rotation how to solve?

What happens when the concrete mixing station stops turning? I’ll teach you.
1. The concrete mixer is overloaded to cause the stirring shaft to stop, just adjust the feed volume, discharge the excess material, reduce the stirring shaft rotation load can be.


2. Side leaves and the inner wall of the stuck material, the mixing shaft before the stop will often have sharp harsh friction sound, this happens, the need to immediately stop the inspection, manual removal of foreign body, re-adjust the concrete mixer mixing blade or side The gap between the leaf and the inner wall of the tank.
3. Concrete mixer motor drive belt is too loose, just after the adjustment of the concrete mixer motor drive belt tension can be.

Steps for commissioning concrete mixing plants

After the concrete mixing station is installed, the debugging of concrete mixing station is also an essential step. After installation and debugging, it can be used safely. Below, Xiaobian for you to explain the debugging steps.


1, in the debugging of the system when the emergency button reset, close the electrical cabinet of male power switch, connected successively on each branch circuit breaker control circuit, power switch, power switch control room, to observe the electrical system there is no abnormal phenomenon, if there is a check immediately;
2. Turn on the buttons of each motor, test whether the steering of the motor is correct, if not correct, should be adjusted immediately;
3. Start the air pump of the concrete mixing station. After the air pressure reaches the requirement, start the air control gates according to the button marking, check whether the movement is flexible, adjust the zero and adjust the sensitivity of the microcomputer;
Check whether the air compressor switch is normal, the barometer is correct, adjust the safety valve pressure to the standard range;
4, the mixer test run, to see if there is abnormal sound, each component is normal work;
5, in the belt conveyor for debugging, need to run, in the process of checking the operation of each idler roller is flexible, should carefully observe the belt, can not have sway, deviation, grinding, skid, deformation and so on;
6, in debugging concrete batching machine, be sure to press the batching button, to see whether flexible and can configure the accuracy, and then adjust the burden reference.

Common faults in the operation of concrete mixing plants

There are many common problems in the concrete mixing station, if a lot of maintenance, it is easier to find some situation, such as: sometimes abnormal noise, sometimes unable to stir, today is to learn about some situation how to determine the source of damage.
During the routine inspection of the mixing station, the main working hours are done after the concrete stops stirring. After ten seconds stop mixing station, shut down the main power, then the rotating disc by hand under the belt pulley, try whether can easily make it turn a week, if you can, can that is responsible for the control of reversal valve is not destroyed, and it is proved that this place has been the need for repair, to invite relevant personnel to timely replacement.


In addition, it is possible to infer whether the reverse control valve of the concrete mixing plant is damaged or not by setting an air vent under the pressure button. Under normal circumstances, the main power switch off after ten seconds, should be less or no gas discharged from the exhaust gas, if there has been a wind blown out and until the next start until the end, it can be proved that the reverse valve is damaged.