Sometimes you think that what you think is not necessarily right. There is a theoretical basis. It is groundless that you think that you and others are doing it. Or you say that what you are doing is unfounded. For example, in the use and maintenance of the sprinkler, there are some wrong ideas. They think that others do it. They also think that it is feasible to think about it. They don’t know that these common sense may cause damage to your vehicle and even cause accidents. Hidden danger.
When using a sprinkler, blindly removing the thermostat of the engine seems to be correct and useful, but it is not. Blindly dismantling the thermostat will cause the engine temperature to be too high, and the coolant can not adjust the cooling intensity, can only perform a large cycle, and therefore can not guarantee the engine to work at a suitable temperature, the engine will work in a cold state for a long time, it will As a result, its power will be lower than usual, wear speed will increase, and fuel consumption will increase.
Some people think that the sprinkler engine has coolant, and it is afraid that the heat is not cold. This is actually incorrect. The use of the engine under low temperature conditions is also a great hazard to the engine. The same situation will occur. To prolong the service life of the engine, the engine should be used correctly according to the temperature specified in the instruction manual of the sprinkler.
The practice of idling a professional sprinkler engine is also wrong. After the car is warmed up, it will not start. After a period of time, the temperature of the engine will naturally increase. In this way, the engine speed is low, and the oil cannot quickly enter the various components for lubrication. Of course, most of them are now EFI engines, so there is no need to warm up again. Even in winter, it takes only 1-2 minutes to get started. Some vehicles have also designed protection devices. After starting, the engine is maintained at normal speed for 1200 rpm (no need of refueling) for 1 minute. The engine is quickly warmed up to protect the engine.
PVC pipe is extruded by hot pressing method after the cooperation of PVC resin, stabilizer and lubricant. It is the earliest plastic pipe developed and applied.
PVC-U pipe has strong corrosion resistance, easy adhesion, low price and hard texture. However, due to the leakage of PVC-U monomer and additives, it is only suitable for water supply system with transmission temperature not exceeding 45 ℃. Plastic pipes are used for drainage, wastewater, chemicals, heating and cooling fluids, food, ultra pure liquids, mud, gas, compressed air and vacuum system applications.
PVC pipe fittings include direct connection, tee and cross joint, and the tee is divided into 45 degrees and 90 degrees.
Advantages of PVC pipe
1. It has good tensile and compressive strength, but its flexibility is not as good as other plastic pipes.
2. Small fluid resistance: the pipe wall of PVC-U pipe is very smooth and has little resistance to fluid. Its roughness coefficient is only 0.009. Its water transmission capacity can be 20% higher than that of cast iron pipe with the same pipe diameter and 40% higher than that of concrete pipe.
3. Excellent corrosion resistance and drug resistance: PVC-U pipe has excellent acid, alkali and corrosion resistance, is not affected by moisture and soil pH, and does not need any anti-corrosion treatment during pipe laying.
4. Good water tightness: the installation of PVC-U pipe has good water tightness whether it is connected by bonding or rubber ring.
5. Anti bite: PVC-U pipe is not a nutrient source, so it will not be eroded by rodents. According to the experiment conducted by the National Health Foundation in Michigan, mice will not bite PVC-U pipes.
6. Performance test: curing time shrinkage splitting strength tensile property peel strength thermal stability application period storage period release of harmful substances.
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