What Is a Concrete Batch Mixer?

Concrete mixer is a machine that mixes cement, sand aggregate and water and mixes it into concrete mixture. It is mainly composed of mixing drum, feeding and unloading mechanism, water supply system, prime mover, transmission mechanism, frame and supporting device. According to the nature of work, it is divided into batch (batch) and continuous; according to the mixing principle, it is divided into self-dropping and forced; it is divided into fixed and mobile according to the installation method; it is divided into tipping and non-tilting according to the discharge method; According to the structure of the mixing drum, it is divided into pear type, drum type, double cone, disc vertical shaft type and round groove horizontal shaft type.

Concrete mixer , including shaft and conveyor

According to the nature of work, it is divided into batch (batch) and continuous; according to the mixing principle, it is divided into self-dropping and forced; it is divided into fixed and mobile according to the installation method; it is divided into tipping and non-tilting according to the discharge method; According to the structure of the mixing drum, it is divided into pear type, drum type, double cone, disc vertical shaft type and round groove horizontal shaft type. ^[2]

Self-dropping mixers have a long history, as early as the early 20th century,

1 Maintain the cleanliness of the body and remove dirt and obstacles from the body.

2 Check the oil, circuit and control equipment of each lubricating place, and fill the oil as required.

3 Before each shift, add water to the idler for 1 to 2 minutes and check

1. The empty car should be tested before mixing.

2. Adjust the timing of the time relay according to the stirring time, and pay attention to the adjustment in the case of power failure.

3, water-moistened mixing drum and blade and site.

4. In the process, if there is an electrical or mechanical failure, some of the mixture should be unloaded to reduce the load and drive after the failure is eliminated.

5. During operation, check frequently to prevent safety accidents such as electric shock and mechanical injury.

6. After the test, turn off the power, clean the mixer and the site, and clean up. ^[1]

1. The concrete mixer should be set in a flat position, and the front and rear wheel axles should be cushioned with square wood to keep the tires overhead, so as not to move when starting. 2. The concrete mixer should be implemented with secondary leakage protection. After the power is turned on before work, it must be carefully checked, and it can be used after being tested by an empty car. During the test run, it should be checked whether the speed of the mixing drum is appropriate. Generally, the speed of the empty car is slightly faster than that of the heavy car (after loading) by 2 to 3 turns.

3. The rotation direction of the mixer should conform to the direction indicated by the arrow. If it is not true, the motor wiring should be corrected.

4. Check whether the transmission clutch and brake are flexible and reliable, whether the wire rope is damaged, whether the track pulley is good, whether there are obstacles around it, and the lubrication of various parts.

5. After starting up, pay attention to the normal operation of each part of the concrete mixer. When stopping, often check whether the blades of the concrete mixer are bent, and whether the screws have fallen or loosened.

6. When the concrete is stirred or is expected to stop for more than 1 hour, in addition to removing the remaining material, pour stones and water into the shaker, turn it on, and wash out the mortar adhered to the bucket. There must be no stagnant water in the barrel to prevent the barrel and blade from rusting. At the same time, the ash accumulated on the outside of the mixer should be cleaned to keep the machine clean and intact.

7. After work and when the machine is not in use, the gate should be turned off and the switch box should be locked to ensure safety. ^[4]

Pay attention to the following when cleaning the concrete mixer:

First, regularly perform the maintenance and maintenance operations of the items specified in the maintenance regulations, such as cleaning, lubrication, refueling, etc.

Second, before the concrete mixer is started, check whether the controllers are good. After the shutdown, pour water and stones into the mixer for 10-15 minutes for cleaning, and then clear the water and stones. When the operator must enter the mixing drum for cleaning, in addition to cutting off the power and removing the fuse, the switch box must be locked.

Third, it is forbidden to use a sledge hammer to remove the concrete accumulated in the concrete mixer barrel, and it can only be removed with a chisel.

Fourth, in the severe cold season, after the work is completed, the mixer drum should be washed with water and the water in the pumps, water tanks, and water pipes should be drained to prevent the water pumps, water tanks, and water pipes from freezing. ^[4]

Concrete mixer operation steps and precautions:

Concrete mixer operation steps:

1. Turn the function switch on the column to the "Auto" position and press the start switch on the controller. The entire operation program will automatically control the operation by itself.

2. It will stop automatically after the whole process is finished. If you need to stop in the middle of the running project, you can press the stop button and then restart.

3. After pressing the start button, the display will start to display the time, slow, sand, fast, stop, fast, and running indicators flash on time.

4. For automatic control, all manual function switches must be turned to the stop position. ^[4]

Concrete mixer operation matters:

1. The gap between the blade and the wall of the pot should be measured with a measuring gauge. If the gap is too poor, the upper and lower positions of the blade can be adjusted to achieve the specified range.

2. After each use, the stirring leaves and pot should be cleaned in time. The electrical parts should be avoided from severe vibration, keep away from water and high temperature, and pay attention to dust.

Knowing how to use the mixer can better improve the efficiency of engineering work.

The structural design of the mixer directly affects the adaptability to various concrete and the strength and wear resistance of the material. Therefore, in the structural design of the concrete mixer, it is necessary to fully absorb and draw on the advantages of various different mixers to continuously improve the performance and use of the mixer, and enhance the mixing ability of the mixer. ^[1]