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    • 1. 发明专利
    • CORROSION POTENTIAL SENSOR, BOILING WATER REACTOR POWER PLANT AND pH SENSOR
    • 腐蚀潜在传感器,锅炉水反应堆发电厂和pH传感器
    • JP2003004887A
    • 2003-01-08
    • JP2001187955
    • 2001-06-21
    • Hitachi Ltd株式会社日立製作所
    • WATANABE RYUJISAKAI MASANORITAKAHASHI TAKUYAAKAMINE KAZUHIKO
    • G21C17/02G21D1/00
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a corrosion potential sensor provided with a structure densely filling a specific amount of oxide powder in a limited space and capable of a long term use and a boiling water reactor power plant.
      SOLUTION: The corrosion potential sensor has a sensor box which is made by connecting a cylindrical metal body 5 to the open end of a zirconia cylinder 1 closed at the one end by way of an intermediate metal cylinder 6 for connection and has a structure that metal powder 3 for power collection and metal oxide powder 2 for electrochemical system consisting of a compact are sealed in the zirconia cylinder 1 and a potential detection lead conductor 4 is arranged for short-circuiting the metal powder 3 for power collection to detect the potential by a mineral-insulated cable 7 by way of the lead conductor 4. The packing density of silver oxide rises to 2 to 3.5 times compared with conventional natural packing method, which prevents the zirconia tube inside from silver oxide depletion, maintains oxygen partial pressure constant for a long period and makes to obtain a corrosion potential sensor capable of long term use.
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:提供一种腐蚀电位传感器,该腐蚀电位传感器具有在有限空间中能够长期使用的特定量的氧化物粉末和沸水反应堆发电厂的结构。 解决方案:腐蚀电位传感器具有传感器盒,该传感器盒通过将圆柱形金属体5连接到通过用于连接的中间金属圆筒6在一端封闭的氧化锆气缸1的开口端而制成,并且具有金属 用于集电的粉末3和由紧凑件组成的电化学系统的金属氧化物粉末2密封在氧化锆圆筒1中,并且设置潜在的检测引线导体4,用于短路用于集电的金属粉末3以通过 矿物绝缘电缆7通过引线导体4.氧化银的填充密度比传统的天然填充方法上升2至3.5倍,这防止氧化锆管内部氧化银消耗,维持氧分压恒定 使得获得能够长期使用的腐蚀电位传感器。
    • 10. 发明专利
    • ELECTRODE FOR VACUUM CIRCUIT-BREAKER
    • JPH01117214A
    • 1989-05-10
    • JP27298187
    • 1987-10-30
    • HITACHI LTD
    • WATANABE RYUJIANDO HISASHIIWASHITA KIYOJIKANAMARU NAONOBU
    • H01H33/66H01H1/02
    • PURPOSE:To obtain an electrode with no diffusion and permeation of the Ag solder inside the contact by connecting the electrode in a plastic fluid connection between the contact and an auxiliary electrode each other. CONSTITUTION:Taking an example in case of plastic-connecting a Co-40Ag2Se vacuum-impregnated contact material to an arc auxiliary electrode plate made of Cu, the Co-40Ag2Se contact is made by press-forming a Co powder of -200 to +325 mesh at the pressure about 3ton/cm , and sintering temporarily in H2 at 900 deg.C, and then, Ag2Se is vacuum-impregnated 40% in the pores. The connecting grooves for plastic connecting are cut in the form shown in the figure (a) at both sides of a contact 1, the disk-form contact 1 is loaded on a saucer-form arc auxiliary electrode 2 made of Cu, forming little clearance inside the electrode 2, as a support of the arc auxiliary electrode plate 2, and the auxiliary electrode plate 2 is pressurized locally at the pressure about 85kg/mm in the arrow directions by using a ring-form upper punch 4. As a result, a part of the Cu auxiliary electrode plate 2 generates a plastic fluid in the direction square to the pressure direction, to connect integrally to fill up the connecting grooves of the contact 1.