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按照标准要求自应力稍筋混凝土输水管必需逐跌进行水匝抗渗、抗裂检验。水压检验是在专用设备水压检验机上进行的。目前大多数水泥制管厂所使用的水压栓验机的压源—压力水泵部是单机配套,即一台水压检验机配置一台或二台(其中一台备用)压力水泵。生产实践证明,此种安装方法存在以下欠缺:1.压力水泵启动频繁,机械磨损大,功率消牦大。水是一种近似于不可压缩的液体,自应力管在恒压过程中,由于管路系统中局部渗漏而造成表压下降,为了补充水压,压力水泵需要频繁启功,这样,既增加
According to the standard, self-stressing slightly reinforced concrete water pipes must be tested for water impermeability and crack resistance. Water pressure inspection is performed on a special equipment hydraulic pressure inspection machine. At present, the pressure source-pressure and water pumping department of the hydraulic press testing machine used in most cement pipe mills is a stand-alone machine, that is, one hydraulic pressure inspection machine is equipped with one or two (one of which is standby) pressure pumps. Production practice proves that this kind of installation method has the following deficiencies: 1. The pressure water pump starts frequently, the mechanical wear is large, and the power consumption is large. Water is an almost incompressible liquid. In the process of constant pressure in the self-stress pipe, due to local leakage in the pipe system, the gauge pressure drops. In order to supplement the water pressure, the pressure pump needs frequent work, thus increasing