VACUUM VALVE

• Main Authors: ASARI NAOKI, HIMATA YUKIHIKO, NIWA YOSHIMITSU, DAIBO AKIRA, KONDO JUNICHI, TATEYAMA TOMOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 28.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

To provide a vacuum valve with which, by maintaining the size of a current-carrying shaft in a contact adjacent part as conventionally is, it is possible to prevent a decrease in the current-carrying capacity of a current flowing in electrodes, and at the same time to move the arc generated between the electrodes when the vacuum valve is opened in the radial direction without causing it to stay stagnant, while driving it in the circumferential direction along the outer circumferential edge.SOLUTION: The vacuum valve comprises: contacts 8, 10 having electrode-facing surfaces E1s, E2s which are separably located facing each other and divided by a plurality of slits 12, 13; and current-carrying shafts 9, 11 that are connected to the contacts. Contact-adjacent parts 9p, 11p of the current-carrying shafts that are adjacent to the contacts have their sizes kept constant, and are composed of a plurality of regions differing in electric conductivity (high conductivity region H, low conductivity region L), with the low conductivity region disposed so as to continuously enclose the outside of the high conductivity region.SELECTED DRAWING: Figure 3 【課題】接点隣接部における通電軸の大きさ（太さ）を既存のまま一定に維持することで、電極に流れる電流の通電容量の低下を防ぐと同時に、真空バルブの開放時に電極相互間に発生したアークを、停滞させること無く半径方向に移動させつつ外周縁に沿って円周方向に駆動させることが可能な真空バルブを提供する。【解決手段】離接可能に対向して位置付けられ、複数のスリット１２,１３によって分画された電極対向面Ｅ１ｓ,Ｅ２ｓを有する接点８,１０と、接点に接続された通電軸９,１１とを具備し、通電軸のうち接点に隣接した接点隣接部９ｐ,１１ｐは、その大きさが一定に維持されていると共に、導電率の異なる複数の領域（高導電率領域Ｈ、低導電率領域Ｌ）で構成され、接点隣接部において、高導電率領域の外側を連続的に囲むように低導電率領域が配置されている。【選択図】図３