CNC plasma cutting machine has many advantages such as simple operation, high precision, high work efficiency, low labor intensity, etc. It is widely used in many kinds of processing parts. CNC plasma cutting machine is often used in many industries, such as: chemical machinery, automotive industry, general engineering machinery. However, in recent years, many accidents have occurred due to the failure of the CNC plasma cutting machine. Therefore, in the process of using CNC plasma cutting machines, we must abide by the correct operating procedures of the CNC plasma cutting machine and take relevant measures to ensure its own safety. 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.
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The following Xiao Bian gives you a brief introduction about the safety and protection measures that CNC plasma cutting machines should take.
1. Operators must wear protective masks, welding gloves, caps, dust masks, and acoustic earmuffs. Persons who do not wear protective glasses are strictly prohibited from directly observing the plasma arc. Exposed skin is strictly prohibited from approaching the plasma arc.
2, when cutting, the operator should stand upwind operation. The air can be drawn from the lower part of the table and the open area on the operating table should be reduced.
3, when cutting, when the no-load voltage is too high, should check the electrical grounding, access to zero and cutting torch handle insulation, the workbench should be insulated from the ground, or in the electrical control system installed no load circuit breaker.
4. The high-frequency generator should be provided with a shielding shield. After high-frequency arc ignition, the high-frequency circuit should be cut off immediately.
5. The use of tantalum and tungsten electrodes shall comply with Article 12.7.8 of JGJ33-2001.
6, cutting operations and personnel must wear protective equipment as required. It must also take measures to prevent electric shocks, falling from high altitudes, gas poisoning and fire accidents.
7. The electric welding machine used on site shall be provided with a rain shelter, moisture-proof and sun-protecting hangar, and corresponding fire-fighting equipment shall be installed.
8. Seat belts must be fastened when welding or cutting at high altitude. Fire protection measures should be taken around and below the welding cuttings, and should be guarded by special persons.
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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.