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    • 61. 发明专利
    • Abnormal temperature detecting method of electric power cable
    • 电力电缆异常温度检测方法
    • JPS6186624A
    • 1986-05-02
    • JP20875084
    • 1984-10-04
    • Fujikura Ltd
    • TANAKA TOMOKAZUMOTAI TSUNEAKIONO MIKIYUKIWATANABE KO
    • H01B7/32G01K5/48G01K11/00G01K11/12
    • G01K5/483
    • PURPOSE:To detect the yield of abnormal temperature in the conduction of electric power cable directly, by displacing a configuration memorizing alloy material by the temperature increase in the electric power cable, bending optical fiber, and detecting the time change in reflection intensity of light pulses at this time. CONSTITUTION:A configuration memorizing alloy material 4 is inserted along a built-in optical fiber 3 in electric power cable. Light pulses are sent into the fiber 3. When the fiber 3 is in a normal state, the outputted pulses change approximately linearly. When the temperature of a conductor 1 is increased to a value exceeding the transition temperature of the alloy material 34, the alloy material 4 deforms each part of the fiber 3, and many bent parts 10 are formed. Therefore the outputted light pulses change in a small step shape. When the temperature of the conductor is partially increased in an abnormal phenomenon, the temperature of only the alloy material 4 in the vicinity of the abnormal location is increased to the value exceeding the transition temperature. Only a part of the fiber 3 is deformed. The outputted light pulses change in a step shape only at the specific part. By monitoring the outputted light pulses, the abnormal temperature of the electric power cable can be detected.
    • 目的:直接检测电力电缆传导异常温度的产量,通过电力电缆温度升高,弯曲光纤移位配置记忆合金材料,检测光脉冲反射强度的时间变化 此时。 构成:在电力电缆中沿着内置光纤3插入记录合金材料4的结构。 光脉冲发送到光纤3中​​。当光纤3处于正常状态时,输出的脉冲大致线性变化。 当导体1的温度增加到超过合金材料34的转变温度的值时,合金材料4使纤维3的每一部分变形,并且形成许多弯曲部分10。 因此,输出的光脉冲以小的步长变化。 当导体的温度异常现象部分增加时,只有异常位置附近的合金材料4的温度升高到超过转变温度的值。 只有纤维3的一部分变形。 所输出的光脉冲仅在特定部分以阶梯形变化。 通过监视输出的光脉冲,可以检测电力电缆的异常温度。
    • 63. 发明专利
    • Finned pipe for heat exchange and its manufacture
    • 用于热交换及其制造的精细管道
    • JPS6129693A
    • 1986-02-10
    • JP15159984
    • 1984-07-20
    • Fujikura Ltd
    • MASUKO KOICHIMOTAI TSUNEAKIMOCHIZUKI MASATAKAITO MASAHIKOTAKAHASHI KAZUYASU
    • B21C37/26B21D53/06F28F1/36
    • F28F1/36
    • PURPOSE:To maintain always surely the heat exchange rate, by a method wherein a metallic tape is bent and wound on a pipe in order that many slits which were formed at the prescribed spaces from side edge to nearly center part in the width direction, become vertical to the outer periphery surface of the pipe. CONSTITUTION:A coil 5 of metallic tape on which many slits are formed at the prescribed intervals from one side edge to the nearly center part in a width direction, is wound spirally on the circumference of the pipe 2. Accordingly, fins 1 are divided in the strip type, because slits 3 are formed radially centering the axis center of the pipe 2. When high temperature fluid which flows in the pipe 2 is cooled by heat dissipation, at the outer periphery side of the pipe 2 standing vertically, air of which temperature is increased rises in the axial direction of the pipe 2 through slits 3, and the up-flow effect is generated, and stagnated parts will not be generated, and the heat exchange effect is maintained, and dust attaching to fins 1 are prevented.
    • 目的:为了保持热交换率,通过将金属带弯曲并缠绕在管上的方法来保持热交换率,以便在宽度方向上从侧边缘到大致中心部分形成的许多狭缝成为 垂直于管的外周表面。 构成:在宽度方向上从一个侧边缘到近中心部分以规定间隔形成有许多狭缝的金属带的线圈5螺旋地卷绕在管2的圆周上。因此,翅片1被分成 由于狭缝3以管2的轴心为中心而形成狭缝3,因此,在管2内流动的高温流体通过散热进行冷却时,在管2的外周侧垂直放置的情况下, 温度通过狭缝3增加管2的轴向上升,产生上流效果,不会产生停滞的部分,保持热交换效果,防止附着在散热片1上的灰尘。