In case of failure maintenance of concrete mixer truck, the cab of concrete mixer truck shall be closed, the engine shall be shut down, and necessary safety warnings shall be made. The specific safety operation guidelines are as follows: when concrete mixer truck needs maintenance or inspection, a sign board of "under maintenance" must be hung at an obvious position. Pull out the switch key and pull the handbrake. When troubleshooting the bottom of the concrete tank truck, there shall be firm support facilities, and the front and rear wheels shall be drilled with wooden wedges to prevent movement and sliding. When two or more persons operate at the same time, one person shall be appointed to command, and they must be coordinated and concentrated. They shall not get on the vehicle without the command of the commander.
Reliable lifting equipment shall be provided when moving the tank or parts of the mixer truck. If the components of Dongfeng chuangpu 3-party mixer truck need to be lifted manually, they must take care of each other and place the components firmly to prevent people from being injured by tilting. It is strictly prohibited to use open fire for lighting when the mixer is repaired. When cleaning parts with gasoline, keep away from open fire. The used waste oil shall not be spilled at will, but shall be properly disposed of in the barrel. The oil touch cloth and waste cotton yarn shall be placed in a fixed container and cleaned or disposed of in time.
When the screws of machine parts need to be tightened, open handles must be used to avoid accidents caused by sliding. When using manual electric tools, you must wear safety gloves and protective glasses, and assign a special person to control the electrical switch, so as to cut off the power supply in time in case of failure and avoid accidents. If the failure of the concrete mixer cannot be repaired and eliminated, the technical and after-sales service personnel of the mixer manufacturer shall be consulted, and the on-site guidance and maintenance of the concrete mixer technician shall be required if necessary.
In addition, gasoline is easy to evaporate under high temperature, and the engine fuel supply system is prone to "air resistance", which further affects the normal operation of the engine. Therefore, pay special attention to the normal operation of the cooling system. The cooling water, battery water and engine oil evaporate rapidly in summer. Check and supplement them in time to avoid overload operation as far as possible. At the same time, replace with high viscosity lubricating oil and shorten the oil change cycle appropriately.
Vehicle spontaneous combustion often occurs when electronic components are at high temperature, and the short circuit of electronic components is an important reason for vehicle spontaneous combustion. Therefore, in the process of driving, once the trump 3-party mixer of heavy truck finds problems with vehicle electronic components, it must be checked in time and can not be ignored. When driving in hot weather, the cooling water in the water tank of the 3-party mixer truck evaporates faster during the big transportation. In case of water shortage, stop immediately, supplement the cooling water after idling and cooling, and pay attention to opening the water tank cover to prevent scalding. Therefore, it is particularly important to analyze and study the formation mechanism of electromagnetic interference in spark ignition system, take practical and effective suppression measures, and improve the electromagnetic compatibility design of spark ignition system. The electromagnetic interference of ignition system mainly comes from high-voltage ignition wire, spark plug, ignition coil and other components.
When the secondary circuit voltage reaches the spark plug air gap breakdown voltage, the spark plug gap is broken down, and the energy stored in the spark plug distribution capacitance is released rapidly. The discharge time is very short, only a few microseconds, but the discharge current is very large, up to tens of amps. This process is called capacitance discharge process. The discharge at this stage makes the voltage and current of the secondary circuit form a steep pulse form. This broadband pulse radiates electromagnetic waves through the exposed high-voltage ignition line, causing electromagnetic interference in the surrounding environment.