根据农业基本建设和围垦海涂的需要,省机械科学研究所和萧山县围垦农机厂承担了省科委下达的4ZN-12型自吸式泥浆泵的研制任务。一年多时间内,先后经过三轮样机的反复修改,并通过对泵的性能、汽蚀、自吸性能试验和502小时的耐久试验,各项性能达到设计任务书的要求。省机械局曾于最近进行了鉴定,认为该泵具有结构紧凑、效率高、安装方便、使用范围广等优点,适用于造闸、建桥等海涂围垦的土方施工作业。原来在围垦海涂筑桥、建闸打沉井时,耗资费,投工多,劳动强度大,一般沉一只沉井得花四百元钱左右,花工量二百工,而 According to the needs of agricultural capital construction and reclamation of sea-to-sea, the Provincial Institute of Machinery Science and the Xiaoshan County Reclamation Farm Machinery Factory have undertaken the research and development tasks of the 4ZN-12 self-priming mud pump issued by the Provincial Science Commission. More than a year’s time, after repeated prototype of three rounds of repeated changes, and through the pump performance, cavitation, self-priming performance test and 502 hours of durability test, the performance of the design requirements to meet the book. Provincial Bureau of Machinery has recently been identified, that the pump has the advantages of compact structure, high efficiency, easy installation, the use of a wide range of advantages, for brake, bridge construction and other reclamation of earthwork earthwork. In the original reclamation of tidal flats to build bridges and gates to open caisson, the cost of fees and more labor are involved. As a result, labor intensity is generally high.