The concrete mixer truck is composed of special vehicle chassis, mixing tank, feeding and discharging device, water supply system and hydraulic system. The mixing tank is used to stir and mix concrete. The mixing tank is mainly composed of tank body, connecting flange, raceway and mixing blade. The shape of the mixing tank is mostly pear shaped, also known as snail truck. The material of the mixing tank is generally high-strength steel plate. In order to automatically load and unload concrete, spiral blades of shape are welded on the inner wall of the mixing tank. When the mixing tank rotates in the forward direction, the concrete in the tank will not set quickly due to continuous stirring. When it rotates in the reverse direction, the concrete will be automatically discharged from the shoe opening.
The concrete mixer truck uses a special chassis, which has sufficient bearing capacity and strong output power. Now the mixer truck is lightweight design, and the loading capacity is relatively large.
The structural design of the mixer truck shall be reasonable and easy to operate. The inlet and outlet of the mixing tank shall be resistant. Sand and stones are the main components of concrete. These materials will cause serious wear at the inlet and outlet. Generally, the service life of the concrete mixing tank made of low alloy steel is 50000-80000 m3, while the service life of the blades in the tank is about 30000-40000 m3. In order to avoid concrete moisture segregation or solidification during driving and waiting for unloading, the power of the chassis is taken out through the power take-off device, and the variable pump of the hydraulic system is driven to convert the mechanical energy into hydraulic energy and transmit it to the quantitative motor. The motor then drives the reducer, and the reducer drives the mixing device to mix the concrete.
In this process, the mixing tank needs to rotate at a uniform speed. During unloading, it rotates in the opposite direction. The concrete in the tank is rotated by the blades and unloaded evenly and continuously. The feed and discharge system is composed of feed hopper, discharge hopper, main discharge tank, home, locking frame, etc. it is an important part of the mixer, which directly affects the speed and quality of feed and discharge. The feed and discharge hopper is connected with the backstage support frame of the subframe through the frame. The feed liner in the discharge hopper and the main discharge tank is made of rigid strength fine grain alloy steel, When choosing a mixer truck, we should pay attention to understand its chassis configuration and top material.
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