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    • 4. 发明公开
    • Pilot control valve for controlling a reciprocating pump
    • 用于活塞泵的先导阀
    • EP1059425A3
    • 2002-01-02
    • EP00112413.0
    • 2000-06-09
    • Checkpoint Fluidic Systems International, Ltd.
    • Elliott, Andrew C.Guccione, Ray A., Sr.
    • F01L25/06
    • F01L25/063
    • A pilot control valve for controlling a reciprocating pump having a valve member shiftable within a valve body between a first or "downstroke" position and a second or "upstroke" position. When the valve member is in its first position, the valve member allows communication of control fluid to the lower surface of a piston to move the piston from a first position to a second position. As the piston reaches its second position, a vent in a rod attached to the piston allows control fluid acting on the valve member to depressurize. As such control fluid is depressurized, pressurized control fluid acts on the valve member to move the valve member from its first position to its second position. In its second position, the valve member blocks communication of the control fluid to the lower surface of the piston and allows communication of the control fluid to the upper surface of the piston causing the piston to return to its first position. As the piston returns to its first position, the vent in the piston rod allows the pressurized control fluid acting on the upper surface of the piston to act on the valve member to move the valve member back to its first position. In its first position, the valve member blocks communication of the control fluid to the upper surface of the piston and allows communication of the control fluid to the lower surface of the piston and the process is repeated. In this manner, the pilot control valve of the present invention achieves a consistent pumping rate for a reciprocating device coupled to the pilot control valve.
    • 5. 发明公开
    • DEVICE FOR DIGITAL HYDRAULIC PRESSURE TRANSFORMATION (DHPT)
    • 数字液压变换装置(DHPT)
    • EP1042596A1
    • 2000-10-11
    • EP98962706.2
    • 1998-12-24
    • T. Potma Beheer B.V.
    • POTMA, Theodorus, Gerhardus
    • F02B71/04F15B21/04F01L25/06
    • F01L25/06F02B71/045F02B75/04F15B21/047
    • The object of the invention is to provide a device for digital hydraulic pressure transformation with low loss, intended for flow- and power control for hydraulic machines, particularly hydraulic cylinders, which via a switching device are connected to a pressure reservoir with constant high pressure. According to the invention an intermediate mass is present between the switching device and the hydraulic machine which mass is activated by the flowing medium, the intermediate mass being of such size that the average velocity of the flow in the pipe during the open period of the switching device is sufficiently low to bring the hydraulic medium into the hydraulic machine so slowly, that the pressure change at the location of the hydraulic machine is smaller than the pressure difference between the reservoir and the momentary pressure at the location of the hydraulic machine, as result of which a gradual stepwise rising or lowering of said pressure level is made possible.
    • 本发明的目的是提供一种低损耗数字液压变换装置,用于液压机器,特别是液压缸的流量和功率控制,其通过开关装置连接到具有恒定高压的蓄压器。 根据本发明,在开关装置和液压机之间存在中间质量,该中间质量由流动介质激活,中间质量的大小使得在切换的打开时段期间管中的流动的平均速度 装置足够低以将液压介质如此缓慢地引入液压机中,使得在液压机位置处的压力变化小于在液压机位置处的储存器和瞬时压力之间的压力差,结果是 其中所述压力水平逐渐升高或降低成为可能。
    • 7. 发明公开
    • Aggressive liquids dosage membrane pump
    • Dosierungsmembranpumpe four aggressiveFlüssigkeiten。
    • EP0408083A1
    • 1991-01-16
    • EP90113590.5
    • 1990-07-16
    • Vukicevic, Dragutin
    • Vukicevic, Dragutin
    • F04B43/10F04B15/04F04B9/12F01L25/06
    • F04B9/135F01L25/063F04B15/04F04B43/1136
    • The invention refers to the construction of an aggressive liquids dosage membrane pump as entirety especially to the parts and structures: the distributor of aggressive liquid (1.00), distributor of air 3/2 (2.00) and membrane (3).
      The distributor of aggressive liquid (1.00) is made as a united entirety which produced a united compact constitution. Membrane (3), made up of tephlon, are rigidliy connected by the connecting rod (5).
      The pump works in the following way: while one of the membranes sucks the aggressive liquids as a result of the under pressure which it pro­duces in its chamber, the other membrane pushes the already sucked liquid with the power of air under the pressure which has an influence from its inside. When the membrane, which sucks in the liquid, touches the micro switch, the role of the membrane is being exchanged. All parts of the chamber are made of materials which are resistent to aggressive liquid. These are tephlon, Koterm and stainless steel.
    • 本发明涉及侵略性液体剂量膜泵的结构,特别是部件和结构:侵蚀性液体(1.00)的分配器,空气3/2(2.00)和膜(3)的分配器。 侵略性液体(1.00)的经销商是作为一个统一的整体,产生一个统一的紧凑的结构。 膜(3)由铁丝网组成,通过连杆(5)硬化连接。 泵的工作方式如下:当其中一个膜由于其室内产生的压力而吸入腐蚀性液体时,另一个膜在空气压力下推动已经吸入的液体,压力为 从里面的影响。 当吸入液体的膜接触微动开关时,膜的作用被交换。 腔室的所有部分均由耐腐蚀性液体的材料制成。 这些是tephlon,Koterm和不锈钢。