Causes and Solutions for Clogging of Slitting Machine Blade Cutting Nozzles
Release time:
2022-05-17
The ignition of the slitting machine blade burner leads to immediate backfire. Due to the oversized outlet aperture, the short hole depth, and the excessively wide gas storage chamber in the nozzle, excess external air accumulates in the burner gas chamber. During continuous quenching, the distance between the cooling water hole and the nozzle flame hole is too close, resulting in excessive steam formation that causes extinguishing backfire. When the slitting machine's blade burner backfires, it can lead to severe fires. When the adjustment valve is closed several times in succession and then reopened...
Causes and Solutions for Clogging of Slitter Blade Cutting Nozzles
1,SlitterIgnition of the blade burner leads to immediate backfire. This occurs due to an oversized outlet hole, a short hole depth, and a wide gas storage chamber in the nozzle, causing excess air to accumulate in the burner chamber. During continuous quenching, if the distance between the cooling water hole and the nozzle flame hole is too close, excessive steam can form, leading to extinguishing backfire.
2. When the slitter's blade burner backfires, it can cause severe fires. If the adjustment valve is closed several times and then reopened, there may still be visible flames in the nozzle. Backfire occurs due to the fast combustion speed of the mixed gas, low gas flow, and insufficient gas supply, causing the flame outside the burner to backfire inside. The presence of carbon black in the nozzle can also lead to backfire, especially with prolonged use and frequent backfires.
3. Aging of the oxygen hose, excessive oxygen pressure, and poor oxidation resistance of the hose can easily lead to backfire or burning.
4. Excessive heat in the nozzle can cause the mixed gas inside the tool to expand, creating additional resistance that hinders gas flow, leading to explosive backfire.
5,Slitter BladeLeakage in the flame nozzle welds, materials with sand holes and air pockets can draw in air during ignition. When the air and gas reach a certain mixing ratio, explosions and backfire can occur. Poor airtightness at the joints of various pipeline sections can lead to gas leaks, forming pathways for backfire.
6. Grease in various parts of the flame nozzle can cause spontaneous ignition or backfire, damaging the oxygen regulator and oxygen hose.
The energy of the preheating flame severely affects the speed and cut quality of the slitter. If the preheating flame is too weak, the steel plate does not receive enough energy, forcing a reduction in the longitudinal cutting speed, or even causing interruptions during the cutting process. Conversely, if the preheating flame is too strong, the reaction heat generated by the burning metal will increase, enhancing the preheating capability at the cutting edge, which can lead to severe melting and collapse of the notch edge, especially in thick plate longitudinal cutting. The relationship between the strength of the preheating flame and the longitudinal cutting speed is mutually restrictive. As the thickness of the workpiece and cutting speed increase, the energy of the flame should also increase.
In fact, adjustingSlitterthe flame of the blade involves adjusting the ratio of oxygen to acetylene, which can generally be divided into three types of longitudinal cutting flames: normal flame, reducing flame, and oxidizing flame. The longitudinal cutting flame can be obtained based on different flame adjustment methods, resulting in different longitudinal cutting effects.
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