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    • 9. 发明授权
    • Method and apparatus for measuring steam density by neutron method
    • 用中子法测量蒸汽密度的方法和装置
    • US5327773A
    • 1994-07-12
    • US15465
    • 1993-02-09
    • Tatsuo NishimuraMichio KatouYasuyuki Hashi
    • Tatsuo NishimuraMichio KatouYasuyuki Hashi
    • E21B43/24E21B47/00E21B47/10G01N9/24G01N25/60G01V5/10G01N31/00
    • E21B47/00E21B43/24E21B47/1015G01N25/60G01N9/24G01V5/107
    • A method and an apparatus capable of measuring the density of steam within a steam pipe even in limited environmental conditions such as in a steam injection well. A vessel which accommodates therein first and second neutron detectors disposed in mutual longitudinal alignment with a neutron source interposed therebetween and in which the second detector is covered with a neutron shield capable of absorbing thermal neutrons while allowing epithermal neutrons to penetrate therethrough is inserted into the steam pipe together with a thermal neutron shielding sheet completely encircling the vessel. From the neutrons which were emitted from the neutron source and passed out and back through the neutron shield and the steam region, those epithermal neutrons which have not undergone transformation to thermal neutrons within the steam region are detected by both the first and second detectors, while the thermal neutrons resulting from the transformation are detected by the first detector only. The steam density is determined on the basis of a cadmium ratio derived from the counts of the two detectors.
    • 即使在诸如蒸汽注入井的有限环境条件下,也能够测量蒸汽管内的蒸汽密度的方法和装置。 容纳在其中容纳第一和第二中子探测器的容器,其与插入其间的中子源相互纵向对准布置,并且其中第二检测器被能够吸收热中子的中子屏蔽覆盖,同时允许超热中子穿过其中插入到蒸汽中 管与一个完全环绕容器的热中子屏蔽片一起。 从中子源发射并通过中子屏蔽和蒸汽区域的中子,从而在蒸汽区域内没有经过热中子转变的热中子由第一和第二探测器检测,而 由转化产生的热中子仅由第一检测器检测。 蒸汽密度基于从两个检测器的计数得到的镉比来确定。
    • 10. 发明授权
    • Press machine with an adjustable shut height
    • 压机具有可调关闭高度
    • US4676090A
    • 1987-06-30
    • US665943
    • 1984-10-29
    • Tatsuo NishimuraTatsuya Tamura
    • Tatsuo NishimuraTatsuya Tamura
    • B21D37/14B30B15/00B21J13/03
    • B21D37/14B30B15/0035Y10T83/8696
    • A press machine is disclosed which is provided with a plurality of press dies fixedly secured on a bolster. The machine has a vertically reciprocable frame member with a predetermined constant stroke, which carries a plurality of pressure plates cooperating with the die, respectively. Each pressure plate is axially movable with respect to the frame member and threadedly connected with a spacer plate arranged between the frame member and the pressure plate. The shut height of the machine can be individually adjusted for each pressure plate, by rotating the spacer plate relative to the pressure plate. The shut height can be optimized very easily and in short a time so that the productivity can considerably be improved.
    • 公开了一种压机,其设置有固定地固定在摇枕上的多个压模。 该机器具有预定的恒定行程的垂直往复运动的框架构件,其分别承载与模具配合的多个压力板。 每个压板相对于框架构件可轴向移动并且与布置在框架构件和压力板之间的间隔板螺纹连接。 通过相对于压板旋转间隔板,可以对每个压板单独调整机器的关闭高度。 关闭高度可以非常容易地和短时间地优化,从而可以显着提高生产率。