在建筑施工和老厂改、扩建中,往往需要对混凝土构件开孔、扩孔和切割。按着习惯作法,一般采用人工凿孔,不但浪费人力,劳动强度大,对结构强度影响亦较大。而用氧乙炔焰和碳弧切割,速度又慢。针对上述问题,国内外正在研究和应用氧矛切割技术,解决混凝土构件、砖墙和大型金属件的开孔、扩孔和切割问题。氧矛切割是利用氧矛枪及其一整套装置构成的 In the construction and renovation and expansion of old factories, it is often necessary to open, ream, and cut concrete components. According to the customary practice, artificial boring is generally used, which not only wastes manpower, but also exerts great labor intensity and has a greater impact on structural strength. With oxyacetylene flame and carbon arc cutting, the speed is slow. In view of the above problems, oxygen spear cutting technology is being researched and applied at home and abroad to solve the problem of opening, reaming and cutting of concrete components, brick walls and large metal parts. Oxygen spear cutting is made using an oxygen spear gun and a whole set of devices