The utility model relates to a multi hole spraying quincunx ring flame nozzle for pipe fittings, belonging to a spraying machine, which is composed of a cylindrical nozzle body, a powder spray hole and a flame spray hole. The nozzle body is cylindrical, the center of which is a powder spray hole, and more than one flame spray hole is arranged around the ring. The flame spray hole is divided into an inclined section and a parallel section from the inlet to the outlet, and the aperture of the parallel section is smaller than the aperture of the inclined section From the inlet to the outlet, the final nozzle is divided into large diameter aggregate section and small diameter acceleration section. The multi hole spraying quincunx ring flame nozzle of the pipe fitting of the utility model can effectively reduce the temperature and speed of the combustion flow at the front end of the powder feeding port because the axial direction of the flame spraying hole of the nozzle is parallel to the axial direction of the powder discharging hole of the nozzle, thus ensuring the requirements of the heating and acceleration of the aluminum powder. The experimental results show that the porosity of the coating is between 30% and 35%, which fully meets the requirements of the process.
【技术实现步骤摘要】
管件多孔喷涂梅花环焰喷咀
本技术属于喷涂机械,尤其涉及一种管件多孔喷涂梅花环焰喷咀。
技术介绍
喷枪在喷涂机械
是对设备、零件尤其是金属管件表面作喷涂处理必不可少的工具,而其重要的组成部分喷咀,则是喷枪的性能优良与否的关键部件。传统金属粉末火焰喷涂枪的梅花形喷咀,其火焰喷孔以一定角度指向喷咀出粉孔轴向前端区域,这种喷孔形成的火焰能量高、速度快,飞经燃流的金属粉末得到有效的加热、加速,从而获得高质量(涂层孔隙率5%以下,结合力高)的金属涂层;这种喷咀用于喷涂低熔点金属(如本工艺采用的铝粉)则粉末烧损严重,无法形成要求的涂层。
技术实现思路
本技术对于上述现有技术的不足,提供了一种管件多孔喷涂梅花环焰喷咀。本技术的管件多孔喷涂梅花环焰喷咀,是由柱状喷咀本体、粉末喷孔和火焰喷孔构成,喷咀本体为圆柱状、其圆心为粉末喷孔、环周排布一个以上的火焰喷孔,且逐火焰喷孔从入口到出口分为倾斜段和平行段、平行段的孔径小于倾斜段的孔径,粉末喷咀从入口至出口分为大口径的集料段和小口径的加速段。作为本技术的进一步改进,在于火焰喷孔的孔径为0.3-1.0毫米。作为本技术的进一步改进,在于以粉末喷孔为心、其环周排布了4-12个相同的火焰喷孔。本技术的管件多孔喷涂梅花环焰喷咀,由于喷咀火焰喷孔轴向与喷咀出粉孔轴向平行,送粉口前端的燃流温度和速度得到了有效的降低,从而保证了铝粉加热、加速的要求。经实验验证,经该喷咀喷涂的铝多孔表面金属管涂层空隙率在30%—35%之间,完全满足工艺要求。< ...
【技术保护点】
1.管件多孔喷涂梅花环焰喷咀,是由柱状喷咀本体(1)、粉末喷孔(2)和火焰喷孔(3)构成,其特征在于喷咀本体(1)为圆柱状、其圆心为粉末喷孔(2)、环周排布一个以上的火焰喷孔(3),且逐火焰喷孔(3)从入口到出口分为倾斜段(4)和平行段(5)、平行段(5)的孔径小于倾斜段(4)的孔径,粉末喷孔(2)从入口至出口分为大口径的集料段(6)和小口径的加速段(7)。/n
【技术特征摘要】
1.管件多孔喷涂梅花环焰喷咀,是由柱状喷咀本体(1)、粉末喷孔(2)和火焰喷孔(3)构成,其特征在于喷咀本体(1)为圆柱状、其圆心为粉末喷孔(2)、环周排布一个以上的火焰喷孔(3),且逐火焰喷孔(3)从入口到出口分为倾斜段(4)和平行段(5)、平行段(5)的孔径小于倾斜段(4)的孔径,粉末喷孔(2)从入口至出口分为大...
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