可调缩孔用于燃煤锅炉的送粉管道，调节管道内的煤粉风压的平衡，保证锅炉的燃烧的稳定性。
Adjustable shrinkage for the coal-fired boiler powder feeding pipe, regulating the balance of the pressure of the coal inside the pipe to ensure the stability of the combustion of the boiler.
插板式单芯可调缩孔图片。插板式单芯可调缩孔主要用于送粉管道上调节一次风管阻力，使每一根送粉管道在燃烧器入口处的一次风速保持一致。编制规格按公制定为：DN200～DN600共9种；编制规格按英制定为：18”、20”、22”、24”、26”、28”、30”、32”共8种，共计17种规格。按磨损程度划分：插板式单芯可调缩孔分为普通型和耐磨型两种。
Flapper single-hole adjustable shrinkage picture. Flapper type single-core adjustable shrinkage hole is mainly used for adjusting the resistance of primary air duct on the powder feeding pipe so as to ensure that the wind speed of each feeding pipe at the burner inlet is consistent. The compilation of specifications according to the public system as: DN200 ~ DN600 a total of 9 kinds of preparation specifications according to the British formulated as: 18 ", 20", 22 ", 24", 26 ", 28", 30 ", 32" Specs Divided by the degree of wear: Flapper-type single-hole adjustable shrinkage is divided into two types of ordinary and wear-resistant.
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