Recently, the high temperature rainstorm alarm is frequent, the highest temperature in the South reaches 41 degrees, and the humidity is about 95%, which is the best time to see the sea.
The engineering machinery works in high temperature and high humidity environment, it is easy to have problems such as performance decline, corrosion deterioration, circuit short circuit and so on, which causes frequent failures and even affects the service life. Therefore, we put forward protective measures pertinent to provide useful reference for construction machinery construction in southern China.
1, the warning of continuous high temperature in summer
In summer, the flow of multi high temperature air is poor, and it is easy to cause the heat of the electrical equipment to run out of the engineering machinery, which will cause the continuous rise of the local temperature of the electrical equipment.
If not handled properly, the temperature will exceed the allowable range, which will directly cause the zero drift and linearity of the electrical components. The strength of the metal material of the electrical components is reduced and some parts are deformed to cause the aging of the related parts or the bad contact points of the contact points, and the electronic components are broken through, and the electrical accidents such as the line fire are caused.
According to statistics, the abnormal temperature rise will result in an increase of 36% of the electrical system failure rate and 33% of the life of the electrical components. Attention should be paid to the heat dissipation and healthy investigation of the electrical system.
2, summer rain and humidity alarm
In summer, the heavy rain engineering machinery works in a high humidity environment for a long time. It will not only cause electrical equipment insulation performance, electrical components corrosion and mildew, but also lead to the decline of electrical equipment performance and service life, and even lead to electrical failures.
If the summer enters the tunnel with high temperature and humidity, if the operation is not understood, the electrical equipment can not be operated in time. It is very easy to make the metal surface of the electrical components to form liquefied water, destroy the insulation of the electrical equipment, and even cause the serious consequences of the burning of electrical components. Therefore, in summer, when the temperature is higher and the humidity is bigger, the work should be prepared in advance.
3. Alarms of construction machinery in high altitude environment
Most of the electrical equipment installed on the normal engineering machinery is designed and used for most of the environment below 1000m. If the summer engineering machinery needs to work under the altitude of more than 1000m above sea level, it is necessary to find the professional personnel to check the health condition of the engineering machinery and replace the electronic components suitable for the local environment in order to avoid the air pressure. The acceleration of the heating temperature of the electric components is reduced, causing some breakdowns caused by the burst of temperature sensitive components.
Data show that the electrical failure caused by environmental factors of construction machinery accounts for 30% of the total electrical system failure. Experienced engineering machinery old drivers also have experience that the temperature, humidity, air pollution and atmospheric pressure of the engineering machinery have different degrees of influence on the normal operation of the electrical system of the engineering machinery. Therefore, we should remind you that before the operation of construction machinery in extreme weather, we must pay attention to the change of temperature and the health status of all parts of construction machinery.
In view of the adverse influence factors of high temperature and high humidity environment on engineering machinery, 2 protective measures are summarized to reduce the shutdown time and maximize the efficiency of the construction machinery.
1, strengthen the field management
In the high temperature and high humidity environment, the field management of construction machinery should focus on rain prevention, heat protection, moisture-proof, sunscreen protection and lightning protection.
Improvement of mechanical parking environment
When choosing temporary stops, try to keep away from ravines, rivers and steep cliffs. The ground foundation should be compacted, the surrounding drainage ditch is dug, the slope is handled well, the weeds are cleaned up and the destruction of the engineering machinery is eliminated by the snake and mouse. The camouflage net, tarpaulin or the temporary hangar should be used to avoid the open storage.
Reasonable arrangement of working time
We should avoid or reduce the construction work under high temperature as far as possible, in order to prevent excessive wear and tear of engineering machinery and the operator is difficult to bear; the operation time should be arranged early and late to avoid high tears at noon. When the temperature is over 38, the outdoor operation should be stopped.
Do a good job of mechanical three defense work
We must do a good job in construction site construction machinery sun protection, rain prevention, lightning protection work, its various electrical switches, power distribution cabinet, and so on, we must have rain and moisture-proof measures. The installation of lightning arresters should be installed in large and large concrete mixing stations. The lightning protection devices should be installed in the low voltage distribution room according to the regulations. In case of heavy thunderstorm, the operation should be stopped and the machinery should be withdrawn to the safety zone.
Pay attention to the equipment safety management and control regularly check whether the lubricating oil, hydraulic oil temperature control device is sensitive, the monitoring device is effective, torque limiter, limit switch, emergency brake switch and other safety protection devices are reliable, braking, steering is good, found hidden dangers in time to eliminate, prohibit equipment disease operation. Dynamic tracking and management of equipment performance can detect abnormal handling in time.
2. Pay attention to maintenance and maintenance
Cooling system
Check the working condition of the engine cooling system regularly to ensure the complete and good performance of the cooling system, especially to check the performance of the cooling pump, the tightness of the fan belt, the vent of the upper cover of the radiator and the ventilation day, the adequacy of the coolant, the good performance of the thermostat and the fan off. The dust and sludge on the heat sink and radiator of the air-cooled engine cylinder should be cleaned in time, and the scale and impurities in the water cooler of the water cooled engine should be cleaned in time.
Electrical system
It is necessary to check regularly whether the wiring post is loose, and whether the wire ends and contacts are oxidized or ablated. It is necessary to adjust the generator regulator properly and reduce the charging current. The surface of the battery should be cleaned regularly. The battery pile head and the positive and negative cable should be firmly connected. The level of the electrolyte level should meet the requirements. The distilled water should be injected in time and the ventilation hole should be kept smooth.
Hydraulic system
Check the leakage of the hydraulic system pipe and radiator regularly, whether the fan works well or not, whether the quantity and quality of the hydraulic oil meet the requirements; it is necessary to clean up the hydraulic oil tank regularly, reduce the internal pollution and maintain the heat dissipation capacity of the hydraulic oil tank. Regular use of hydraulic oil is required to replace hydraulic oil filter element regularly to ensure smooth hydraulic oil pipeline and clean oil.
Other components
Check whether the rotating parts of the transmission box and shaft pin of the engineering machinery are flexible, and whether there are small cracks in the steel structure components to prevent the damage caused by the high temperature and high humidity environment. If it is found that the surface of the shell is aged, cracked and shedding, it should be repaired in time. Rust and paint should be removed in time to avoid corrosion due to excessive rain.
Various kinds of oil
The oil, gear oil, hydraulic oil, brake fluid and grease should be selected in accordance with the requirements of the maintenance instructions of the construction machinery, and the maintenance should be carried out according to the prescribed time interval. When the quantity of these 名媛直播 is insufficient, they should be added in time. When quality is poor, they should be replaced in time. In addition, the oil changing cycle should be adjusted properly according to the actual operating conditions.
