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柳州空压机厂铸工车间一台用于水力清砂的BW250/50型泥浆泵,安装使用不久,安全阀就因阀芯锈蚀失灵,拆修几次也修不好。因为阀失灵,水压超高,仅一年多时间就胀裂报废了四件泵体。1982年初,我们将安全阀芯作了改进,将阀芯的圆柱体表面改为筋面(见附图),减少阀体对阀芯的摩擦阻力,投产使用后阀芯一直保持灵敏,再未发生过裂缸事故。
Liuzhou Air Compressor Casting Workshop BW250 / 50 mud pump for hydraulic sandblasting, the installation of the use of shortly after the valve due to rust valve spool failure, repair a few times also repair bad. Because of the failure of the valve, the water pressure was too high, and only four pump bodies were scrapped in a year or so. At the beginning of 1982, we improved the safety valve core to change the cylinder surface of the valve core to a rib surface (see the attached drawing) to reduce the frictional resistance of the valve body to the valve core. After the valve was put into operation, the valve core remained sensitive and never Cracked tank accident occurred.