Concrete mixer is an important equipment in construction projects, mainly used for mixing concrete. According to different designs and functions, concrete mixers can be divided into various types, among which Medium-Sized Concrete Mixer and Tilting Drum Concrete Mixer are two common ones. The working principle, precautions and operational safety of these two types of mixers are described in detail below.
I. Medium-Sized Concrete Mixer
1. Working Principle
Medium-sized concrete mixer usually adopts double screw blade design. Its working principle is as follows:
Feeding stage: put raw materials such as cement, sand, stone and water into the mixing drum proportionally.
Mixing stage: the motor drives the mixing blades to rotate and produce strong mixing effect. The spiral blade mixes the materials fully by shearing and turning to ensure that each ingredient is evenly distributed.
Discharge stage: after mixing is completed, pour out the mixed concrete by turning over the mixing drum or opening the discharge valve.
2. Attention
Material proportioning: Make sure the proportion of cement, sand, stone and water is correct to ensure the strength and performance of concrete.
Preheating and lubrication: Lubricate the motor and gears regularly to avoid wear and tear caused by lack of lubrication.
Cleaning: After each use, clean up the residual materials in the mixing drum in time to prevent the impact of the next use.
II. Tilting Drum Concrete Mixer
1. Working principle
The structure of Tilting Drum Concrete Mixer is relatively simple, the main working principle is as follows:
Feeding stage: put the pre-weighed cement, sand, stone and water into the tilting drum.
Mixing stage: the motor makes the drum rotate, together with the tilting angle of the drum, the materials keep turning and falling under the action of the inner wall, so as to realize the mixing.
Discharging stage: when mixing is completed, the tilting angle can be adjusted and the opening position of the drum pours out the concrete under the effect of gravity.
2. Attention
Material uniformity: During the mixing process, follow the order of adding materials to ensure that the input materials can be evenly mixed.
Tilt Angle Adjustment: When discharging the material, the tilt angle of the drum needs to be carefully adjusted so that the concrete will not flow out too fast or too slow.
Regular maintenance: In the process of use, check the wear and tear of the drum, and regularly overhaul the bearings and seals to ensure the normal operation of the equipment.
Third, operation safety
Whether it is Medium-Sized Concrete Mixer or tilting drum mixer, operation safety is crucial. Here are some safety operations as follows:
Training and qualification: The operator must be specially trained and hold the corresponding operation qualification certificate to ensure that he/she has a full understanding of the working principle of the equipment and the operation regulations.
Wear safety equipment: Operators should wear appropriate personal protective equipment (PPE) such as helmets, protective glasses, earplugs, gloves and non-slip shoes while working.
Check the equipment: Before each use, carefully check all parts of the mixer, especially the electrical system, mechanical running parts, etc., to ensure that there is no abnormal condition.
Safe Operating Procedures:
Check the environment before starting the machine to make sure there are no other people around.
Make sure the mixer is turned off before performing maintenance or putting in materials.
Avoid putting your head, hands and feet, etc. near the mixing drum while the mixing is running to prevent accidents.
During cleaning and maintenance, disconnect the power supply and make sure the equipment is in a stopped state.
Emergency Handling: Familiarize yourself with the location of the emergency stop device of the equipment, and be able to take safety measures quickly when dealing with unexpected situations.
Fire and explosion prevention: When working near fire sources and flammable and explosive sites, special care should be taken to avoid short-circuiting of electrical wires or overheating of equipment that may cause fire.
Summarize
Medium-Sized Concrete Mixer and Tilting Drum Concrete Mixer have their own advantages and disadvantages, applicable to different types of projects. In the process of use, pay attention to keep the equipment in good condition and follow the safety operation procedures, which can help to ensure the safety of the operators and the efficient operation of the equipment. At the same time, reasonable material proportion and timely cleaning and maintenance are also important measures to ensure the quality of concrete and long-term use of the equipment.
