Some parts of universal roll are prone to defects, so it is necessary to add grease on time, check the wear condition frequently, and repair and replace in time. The team should have a spare cardan shaft assembly to ensure that it can resume work within dozens of minutes in case of defects. Ensure that the hydraulic oil is cleaned. The working environment of concrete mixer truck is bad, so it is necessary to prevent the dirty cement sand from entering the hydraulic system. The hydraulic oil should be changed on time according to the operation manual. Once it is found that the hydraulic oil is mixed with water or sediment, it is necessary to stop the machine immediately to clean the hydraulic system and replace the hydraulic oil.
When trekking on the highway, the discharge chute is lowered to the lowest position and turned to the vertical position with the vehicle body, and the discharge chute is locked on the frame with locking equipment to prevent swing due to unfixed, causing injury and affecting the work of other vehicles. Assuming that some of the work is stopped due to defects, the concrete tank will not roll over, which will lead to the scrapping of the concrete in the truck, or even the whole tank of concrete coagulated in the tank, which constitutes the scrapping of the concrete mixer truck.
At present, all the small concrete mixers at home and abroad use hydraulic transmission, which is mainly composed of gear pump, hydraulic motor and collector block. Here is a detailed introduction.
The collecting block is composed of two relief valves, a manual three position four-way reversing valve, a hydraulic control two position four-way valve and a hydraulic control spring reset two position four-way valve, etc. The collector block has the functions of controlling the hydraulic motor to reverse automatically, restoring forward and reverse manually. The principle is: when the mixing blade is stuck by the aggregate, the oil pressure of the hydraulic motor inlet oil circuit is added, when it reaches 11mpa, the reverse relief valve turns over, the pressure oil makes the hydraulic control spring return through the one-way valve, the two position four-way valve reverses, at this time, the hydraulic control two position four-way valve reverses, so that the oil outlet of the hydraulic motor becomes the oil inlet, and the hydraulic motor reverses.
Ensure that the hydraulic oil cooling equipment is useful. It is necessary to arrange the hydraulic oil radiator on time to prevent the radiator from being blocked by cement, check whether the electric fan of the radiator works normally, and prevent the temperature overrun of the hydraulic oil. Some hydraulic only need to ensure the cleaning of hydraulic oil, and generally have few disadvantages. However, different manufacturers have different service life. When the resistance of the mixing blade is removed, the valves return to the original condition, and the hydraulic motor turns forward.
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