Cast Iron Hand Pumps

Cast Iron Hand Pumps Manual pump, is a kind of pump with manual force. One way manual oil pump is a kind of small hydraulic pump station which converts manual mechanical energy into hydraulic energy. In the case of using matching oil cylinder and special tools, it can carry out various operations, such as lifting, bending, straightening, shearing, riveting, assembly, disassembly and some construction and military construction. In the 1990s, China's mechanical and electrical industry imported advanced assembly and fastening technology, using high-strength hydraulic nut and hydraulic stretcher as the power source, and introduced ultra-high pressure manual hydraulic pump. Manual pump is a kind of hydraulic pump. As the power source of hydraulic system, it is mainly composed of fluid (hydraulic oil, saponified oil, water, etc.) as the medium. In general, the plunger horizontal design is used in the manual hydraulic pump, while the ultra-high pressure manual pump is generated by the conversion of double plunger. As a simple and convenient hydraulic power source, ultra-high pressure manual hydraulic pump is widely used in many fields such as shipbuilding industry, coal mining machinery, petrochemical, metallurgy, electric power and heavy machinery. And its small size, light weight, easy to carry, strong security and other advantages are accepted by the majority of users. At present, most of the manual pumps adopt double plunger design, with low pressure output and high pressure output, but when the pressure pump is in high pressure output, the flow is too small and the work efficiency is low. Taking mine hand pump as an example, the specific parameters are as follows: rated pressure (high pressure) 63 MPa; rated output flow 1.5 ml / time; low pressure output pressure 5-10 MPa; low pressure theoretical flow 12 ml / time; hydraulic oil tank capacity 2 L; maximum handle force not more than 350 n, high pressure plunger diameter 10.5 mm, low pressure plunger diameter 28 mm. In the pressure range of 10-20Mpa, the handle force of manual pump is only 45-90n, which is far lower than the specified 350n, and its efficiency is less than 30% of the rated efficiency.