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(一)吹火的目的学习吹玻璃时,控制火焰是非常重要的。在普通状态的火焰中,只能进行最简单的作业。比较复杂的作业就应当改变火焰的形状,将火焰聚集起来,以适应于吹玻璃的工作。利用吹火设备的装置,可以完成下面的两个任务:(1)使气流经过一管(吹管)吹入灯的火焰中,由于管嘴在火焰中位置的不同,就能使火焰形成适应于吹玻璃所需要的形状(图1中A、B、C和D)。(2)使气流吹入火焰中,气流中的氧气就加速了可燃性气体的燃烧,火焰的温度就可以增高。普通的酒精灯或煤油灯如果不用吹
(A) the purpose of blowing fire When learning to blow glass, the control of the flame is very important. In the normal state of the flame, only the most simple operation. More complex operations should change the shape of the flame, the flame together to adapt to the glass work. The following two tasks can be accomplished by the use of the device for blowing fire: (1) the gas flow is blown into the flame of the lamp through a pipe (blow pipe) which, due to the different positions of the nozzle in the flame, The shape required to blow the glass (A, B, C, and D in Figure 1). (2) The airflow is blown into the flame. The oxygen in the airflow accelerates the combustion of the flammable gas and the flame temperature can be increased. Ordinary alcohol lamp or kerosene lamp if you do not have to blow