To eliminate a possibility of gas leakage from a gas discharge path of a gas pressure type tension adjustment device with a safety valve unit due to aging and a cryogenic temperature by adopting a rapture plate, and allow for train traveling until repair construction by stopping gas discharge due to burst of the rapture plate at a constant amount and maintaining predefined pressure, and rapid repair construction by visibly displaying the burst of the rapture plate to outside with an indicator.SOLUTION: A safety valve unit 5 of a gas pressure type tension adjustment device 1, comprises: a rupture plate 24 which is located on a gas discharge path 20; a spring type safety valve 26 which is located on the gas discharge path 20 on a gas discharge port 20a side than the rupture plate; and a rupture indicator 22 which detects rupture of the rupture plate 24, and displays said rupture to the exterior. A popping pressure of the safety valve 26 is lower than a burst pressure of the rupture plate 24, and a popping stop pressure thereof is set to a pressure which can be maintained in a tension allowable range of a trolley wire.SELECTED DRAWING: Figure 3
【課題】安全弁装置を持つガス圧式張力調整装置のガス放出路からの経年や極低温によるガス漏れの懸念を破裂板の採用でなくす。破裂板の破裂によるガスの放出を一定量で止めて所定圧を維持することで、復旧工事までの電車の走行を可能とする。破裂板の破裂をインジケータで外部に目視可能に表示し、迅速な復旧工事を可能とする。【解決手段】ガス圧式張力調整装置1の安全弁装置5は、ガス放出路20上に配置された破裂板24と、これよりガス放出口20a側のガス放出路20上に配置たばね式安全弁26と、破裂板24の破裂を検出してこれを外部に表示する破裂インジケータ22とを具備する。安全弁26の吹き出し圧力は破裂板24の破裂圧力より低く、吹き止まり圧力は電車線の張力許容範囲に維持できる圧力に設定される。【選択図】図3
GAS PRESSURE TYPE TENSION ADJUSTMENT DEVICE FOR OVERHEAD LINE
架空線用ガス圧式張力調整装置
2019-09-12
Patent
Electronic Resource
Japanese