The utility model relates to a bellows type steam pressure reducing valve, comprising a valve body, a valve cover, a valve rod arranged in the valve body, a bellows arranged on the valve stem, and a valve bead arranged at the lower end of the valve stem. The valve bead is arranged in the valve seat and is pushed against by the air inlet spring. Bottom of the valve body by screw fastening. The upper end of the valve cap is provided with an adjusting handwheel arranged on the upper end of the screw rod. The corrugated pipe is in the shape of Omega, one end of which is opened, one end is closed, and the closing end is provided with an adjusting spring arranged on the screw rod, and the bellows is connected with the valve stem as a whole. An air return valve core connected with the valve stem is arranged at the upper opening of the valve body, and a L shaped balance hole with guiding function is arranged in the air return valve core. The valve body and the valve cover are connected by threads. The utility model can work under high temperature for a long time, and the utility model has the advantages of high strength and long service life.
【技术实现步骤摘要】
本技术涉及减压阀,特别涉及一种波纹管式蒸汽减压阀。现有的波纹管式减压阀,其波纹管材质为磷铜皮,结构为两头对穿,用焊锡连接,密封性欠佳。该波纹管式减压阀长期在高温条件下工作,强度不够,容易产生铜绿,造成脱焊泄漏,使用寿命短。本技术的目的是提供一种改进的波纹管式蒸汽减压阀,它能长期在高温条件下工作,其波纹管由不锈钢制造,用电焊连接,强度高,使用寿命长。本技术所述的是一种波纹管式蒸汽减压阀,它包括阀体,阀盖,在阀体内装设的阀杆,与阀杆安装的波纹管,以及在阀杆下端安装的阀珠,阀珠设置在阀座内,由进气弹簧顶抵,阀体底面由螺塞固紧,阀盖上端装有安装于螺杆上端的调节手轮,所述波纹管呈Ω形状,其中一端开通,一端封闭,封闭端上安装有套装于螺杆上的调节弹簧,波纹管与阀杆装为一体;所述阀体的上口处装有与阀杆连接的回气阀芯,回气阀芯内设有具导向作用的L形平衡孔;所述阀体与阀盖通过螺纹相连接。本技术的波纹管由不锈钢制造,以缝焊(电焊)连接,其强度高,能长期在高温条件下工作,使用寿命长。本减压阀脉冲波动小,减压范围大,灵敏度高,广泛使用于轻工、纺织、造纸等行业,尤其对卫生条件有特殊要求的制药、食品等行业更为适宜。以下结合附图对本技术作详细说明。附图是一种波纹管式蒸汽减压阀的结构示意图。参看附图,一种波纹管式蒸汽减压阀包括阀体1,阀盖2,在阀体1内装设的阀杆3,与阀杆2安装的波纹管4,以及在阀杆2下端安装的阀珠5。阀珠5设置在阀座6内,由进气弹簧7顶抵。阀体1底面由螺塞8固紧。阀盖2上端装有安装于螺杆9上端的调节手轮10,可调节进气。波纹管4呈Ω形状,其中一端开通,一端封闭,此种 ...
【技术保护点】
一种波纹管式蒸汽减压阀,它包括阀体,阀盖,在阀体内装设的阀杆,与阀杆安装的波纹管,以及在阀杆下端安装的阀珠,阀珠设置在阀座内,由进气弹簧顶抵,阀体底面由螺塞固紧,阀盖上端装有安装于螺杆上端的调节手轮,其特征在于,所述波纹管呈Ω形状,其中一端开通,一端封闭,封闭端上安装有套装于螺杆上的调节弹簧,波纹管与阀杆装为一体;所述阀体的上口处装有与阀杆连接的回气阀芯,回气阀芯内设有具导向作用的L形平衡孔;所述阀体与阀盖通过螺纹相连接。
【技术特征摘要】
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