Concrete mixer trucks or ready-mixed concrete trucks are special trucks used to transport ready-mixed concrete for construction; they are often referred to as snail vehicles because of their shape. The truck is equipped with a cylindrical mixing drum to carry the mixed concrete. The mixing drum is always rotated during transportation to ensure that the concrete to be conveyed does not solidify. After transporting the concrete, the inside of the mixing drum is usually washed with water to prevent the hardened concrete from taking up space.
CIMC concrete Mixer consists of the automobile chassis, the mixing drum, the transmission system, the water supply device, the full power power take-off, the front and rear brackets of the mixing drum, the reducer, the hydraulic transmission system, the feeding and discharging system, and the operating mechanism. Due to technical bottlenecks, the domestically produced mixer tanks have a volume of 3m3-8m3 and are made of four large-sized domestically produced parts. Most of the four large-sized parts with a volume of 8m3 or more are imported components.
Mixing truck consists of two types of chassis, drive train, hydraulic system, frame, mixing tank, feeding and discharging device, water supply system, control system, and human ladder. The front end of the mixing tank is connected to the reducer and installed on the front of the rack. The rear end is supported by two rollers mounted on the back of the rack through the raceway.
The power of the concrete mixer truck is transmitted from the full-power power take-off of the second-class chassis to the hydraulic pump through the transmission shaft. The hydraulic pump generates hydraulic energy that is transmitted to the hydraulic motor through the oil pipe. The hydraulic motor converts the hydraulic energy into kinetic energy and accelerates through the reducer. The twist is transmitted to the stirring tank, and the angle of the servo handle of the hydraulic pump is adjusted by adjusting (double acting variable) to realize the positive reversal and the rotation speed of the stirring tank, so as to realize the operations of squeezing, stirring, stirring and discharging.
Concrete mixer purchase
How to choose a concrete mixer truck that I am satisfied with, I believe that many owners are very interested in buying 诀窍, in fact, there is not a lot of embarrassment here, just look at their own needs, the right is the best.
First, choose a mixer truck according to the budget
If you are taking the money by the side, you can suggest that you buy a mixer with a larger tank size, like 12 cubic meters and 14 cubic meters. If you are paying a monthly salary on the project, you don’t have to buy such a large volume. You can buy a 10 party. After all, 12 and 14 parties will be expensive.
Second, according to the road conditions you often run
This road condition is directly related to the rear axle selection at the time of purchase. If the road you are running is very flat and you are usually on a highway, you can choose a single-stage reduction bridge. But if the road conditions you run are not particularly good, there are a lot of pits and stone roads and there are many ramps, then it is better to choose the wheel side deceleration bridge.
Third, the choice of tank volume
The small square mixer truck is now selling more fire, small and convenient. Of course, you have to buy it according to your needs. There are also 10, 12, and 14 parties.
Fourth, the judgment of the quality of the mixer tank
The quality of the tank body mainly refers to the thickness of the tank body. Now generally 5mm thick manganese plate, the owner can ask the manufacturer how thick the tank, if less than 5mm thick, do not have to consider.
Fifth, the choice of chassis and engine
There are many brands of mixer truck chassis, including heavy trucks Haowo series, Dongfeng series, heavy truck Golden Prince series, Auman series, Shaanxi Automobile Delong series, Jianghuai Geerfa, Liuqi Balong and so on. You can buy the chassis according to your preference. Engine brands also have several options. Cummins, Weichai and other engines are well-known in the industry, and the engine can be selected according to fuel consumption.
Sixth, the choice of tires
Generally, there are two kinds of tires for the mixer. One is the wire tire and the other is the nylon tire. The performance of the wire tire is far better than the nylon tire, but the price is more expensive, the owner can choose according to economic conditions. It is worth noting that customers should first ask if the car is the original wire or nylon tire. I bought a car with a nylon tire to prevent the money that was tricked into spending a wire tire.
Seven, the choice of three major hydraulic parts
The three hydraulic parts are the focus of the mixer, and the three parts are hydraulic motor, hydraulic pump and reducer. The three major imports are currently better than the domestic ones, Germany is the first, followed by Italy and the United States, and the prices are relatively high. The three major domestic hydraulics have also done well in recent years, depending on individual economic conditions.
From the above seven aspects, consider choosing the best concrete mixer for you!
Concrete mixer maintenance and repair
As a transportation vehicle, the concrete mixer truck must perform the maintenance system of “regular inspection, mandatory maintenance, and condition-based repair” in accordance with the regulations of the Ministry of Communications No. 13 of 1990 in terms of maintenance and repair. Under this premise, combined with the actual situation of the concrete mixer truck, maintenance and repair should be done. In terms of daily maintenance, in addition to the maintenance of the automobile engine and chassis, the concrete mixer truck must also perform the following maintenance work.
Since concrete will solidify into hard blocks in a short time and it is corrosive to steel and paint, it is necessary to clean the concrete adhered to the concrete storage tank and the inlet and outlet after each use of the concrete storage tank. Serious work. These include:
a. Rinse the feed port with water before each charge to keep the feed port moist during charging;
b. Filling the washing water tank that is included with the vehicle with water at the same time as loading;
c. Rinse the feed port after charging, and wash the concrete remaining near the feed port;
d. After unloading at the construction site, rinse the discharge trough, and then add 30-40 L of cleaning water to the concrete storage tank; keep the concrete storage tank rotating slowly while the vehicle is returning;
e. Remember to let go of the sewage in the concrete storage tank before the next loading;
f. Thoroughly clean the concrete storage tank and the inlet and outlet around the work every day to ensure that no cement and concrete agglomerates.
As long as the above work is not carried out seriously, it will bring a lot of trouble to future work.
After-sales maintenance of concrete mixer truck
One: Reasonably determine the protection period. The car protection cycle refers to the distance or time of car protection. In the process of practical application, the owner of the car should refer to the protection cycle introduced by the automobile manufacturer, contact the car’s own skill and application premise, and make appropriate adjustments to the protection cycle. Generally speaking, the new car is used under the premise of superior road conditions. It does not need to be protected too frequently. The protection cycle of the manufacturer’s rule can be used as the upper limit. If the car skill is poor, or the premise is bad, the protection cycle should be shortened properly.
Second: ample application free testing. The free inspection movement carried out by the concrete mixer manufacturer is often beneficial to the length of the owner. The vehicle owner can apply these inspection movements to perform specific physical examinations on the favorite vehicles, discover and eliminate some potential problems in real time, and then save the high maintenance that can be presented in the future. Protection costs.
Three: As much as possible to crash the repair assembly. Many concrete mixer owners have this feeling. Some of the cars that like the car will not be picked up after the crash and repair, so that the vehicle enters the maintenance period too early. The reason for this kind of scene is to first touch on the assembly skills and quality of the repairman. Therefore, it is best to prevent the crash repair assembly, apply various types of advanced skill protection equipment and tricks, and protect the car from disassembly to prevent damage to the car assembly and components, improve the quality of protection, and then reduce maintenance. Total cost.
Concrete mixer drive maintenance
The driving device is used to drive the rotation of the concrete storage tank. It consists of a power take-off, a universal joint shaft, a hydraulic pump, a hydraulic motor, a control valve, a hydraulic oil tank and a cooling device. If this part stops working due to failure, the concrete storage tank will not be able to rotate, which will cause the concrete in the vehicle to be scrapped, and even the whole tank concrete will be condensed in the tank, causing the concrete mixer truck to be scrapped. Therefore, whether the drive device is reliable or not is a problem that must be highly valued in use. In order to ensure that the drive is in good condition, the following maintenance work should be done:
a. The universal rotating part is the faulty part. The grease should be filled on time, and the wear condition should be checked frequently and repaired and replaced in time. The fleet should have an alternate cardan shaft assembly to ensure that it can recover in a matter of minutes if a failure occurs.
b. Keep the hydraulic oil clean. The working environment of the concrete mixer truck is bad, and it is necessary to prevent the dirty cement sand from entering the hydraulic system. Hydraulic oil should be replaced regularly as required by the manual. Once the inspection reveals that water or sand is mixed into the hydraulic oil, it is necessary to immediately stop the hydraulic system and replace the hydraulic oil.
c. Ensure that the hydraulic oil cooling device is effective. It is necessary to regularly clean the hydraulic oil radiator to avoid the radiator being blocked by the cement, check whether the radiator electric fan is running normally, and prevent the hydraulic oil temperature from exceeding the standard. As long as the hydraulic part ensures that the hydraulic oil is clean, there are generally few faults; however, the manufacturer has different service life.