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公开(公告)号：US3994627A
公开(公告)日：1976-11-30
申请号：US523017
申请日：1974-11-12
申请人： Sergio Calzolari
发明人： Sergio Calzolari
CPC分类号： F01L25/063 , B28C7/163 , F04B7/0241 , F04B9/1176 , Y10S417/90
摘要： A pumping apparatus for wet concrete and the like comprising a pair of piston pumps having parallel axes, interlocked to one another and operating in phase opposition, the orifices of which are alternatively put in communication one with the conduit feeding the wet concrete and the other with the delivery conduit and vice versa by means of a reciprocally movable baffle blade valve having two operative limit positions, characterized by the fact that the pump pistons are each actuated by a single-acting jack, being provided means to at first move the baffle valve into either of its operative positions by means of a hydraulic control device, and then to actuate the jack which is about to begin its intake stroke only when the baffle blade valve has reached one of the limit positions, and to reverse the position of said baffle valve into its second limit position before the beginning of the compression stroke of the pump actuated by said jack and vice versa, and means for interlocking the movements of the jacks, and thus of the pumps connected therewith.
摘要翻译： 一种用于湿混凝土等的泵送装置，包括一对具有平行轴线的活塞泵，该活塞泵彼此互锁并且相反地操作，其孔口可选地与导入湿混凝土的管道连通，而另一个具有 通过具有两个操作极限位置的可往复移动的挡板阀，反之亦然，其特征在于，所述泵活塞各自由单作用千斤顶致动，所述装置首先将挡板阀移动到 通过液压控制装置的任一工作位置，然后仅在挡板阀已达到其中一个极限位置时启动即将开始进气冲程的千斤顶，并且使所述挡板阀的位置反转 在由所述千斤顶致动的泵的压缩冲程开始之前进入其第二限位位置，反之亦然，以及用于将m 千斤顶的水流，以及因此连接的泵。
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2.发明授权
公开(公告)号：US3962086A
公开(公告)日：1976-06-08
申请号：US497101
申请日：1974-08-13
申请人： Lionello Rossi
发明人： Lionello Rossi
CPC分类号： B03B9/063 , B01D21/0006 , B01D21/0012 , B01D21/04 , B01D21/307 , B01D21/34 , B03B5/48 , B03B5/52 , Y02W30/58
摘要： An apparatus for the separation of the components of an aqueous concrete grout obtained from washing operations of automotive concrete mixers in a washing station comprising two tanks connected in series, into the first of which are mounted means to separate in sequence and to discharge gravel and crushed stones and then sand, while into the second tank means are provided to perform the separation of the cement from the water by decantation and means to collect and discharge said cement out of said tank, said means consisting of a longitudinal endless conveyor carrying transverse scraping bars sliding along the bottom of said tank, a pump to suck the purified water from said second tank and to convey it until the washing station to be distributed into the drums of the mixers from which is discharged into the inside of a first unit of the first tank provided to separate the gravel and crushed stones means being also arranged at the end of the first tank to collect continuously the water from said tank and to convey it into the second tank.
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3.发明授权
公开(公告)号：US4105373A
公开(公告)日：1978-08-08
申请号：US744326
申请日：1976-11-23
申请人： Sergio Calzolari
发明人： Sergio Calzolari
CPC分类号： B28C7/163 , F01L25/063 , F04B7/0233 , F04B7/0241 , F04B9/1178 , Y10S417/90
摘要： A concrete pumping unit comprising a pair of parallel piston pumps, alternately placed in communication with a concrete supply conduit and with a concrete delivery pipe, through a single baffle blade valve and respectively driven by coaxial fluid pressure piston cylinders is disclosed. The cylinders are interlocked with each other by a pipe which places in communication the chambers of said fluid pressure cylinders, opposite to the chambers in which the pressurized fluid is supplied and discharged through orifices near the ends of said cylinders. A hydraulic circuit is provided for placing a fluid supply pump, in communication with the fluid pressure piston cylinder performing the suction phase, while the orifice of the other fluid pressure piston cylinder is placed in communication through another circuit including, a four-way changeover electro-valve and an actuator distributor device with a discharge reservoir. The said actuator-distributor device comprises two hydraulic pistons and cylinders, operating in phase opposition, the piston rods of which are linked to the ends of a rocking bar, the pivot pin of which is integral with the spindle of the baffle blade valve. The hydraulic piston cylinders have closed ends and are each provided near each of its ends with an orifice. First orifices, positioned near one of the two ends of said cylinders are interconnected by a pipe, while second orifices which are arranged near the other ends are respectively connected by a respective pipe to the four-way changeover electrovalve. The electrovalve is connected to a fluid pump and to a pipe to return the fluid into the supply reservoir of said pump. A third orifice is arranged in an intermediate position relative to the first and second orifice of each hydraulic pump cylinder, and is positioned just downstream of the piston when it is reaches the limit position near the respective first orifice of the respective cylinder. The third orifices are connected respectively with one of the orifices for the supply of the fluid into or for the discharge of fluid from the fluid pressure piston cylinders. From the pipe interlocking the first orifices of said hydraulic distribution piston pumps there is a branch pipe directly connected to the fluid reservoir.
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