FUSIBLE PLUG

• Main Authors: AOKI ATSUYA, TAKAHASHI TAKESHI, IWAMOTO NATSUKI, WATABE YUDAI, TAKIGUCHI HIROSHI, NUMAZAKI KAZUSHI
• Format: Patent
• Language: English; Japanese
• Published: 10.08.2022
• Subjects: ALLOYS; BLASTING; CASTING; CHEMISTRY; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; FERROUS OR NON-FERROUS ALLOYS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PISTONS; POWDER METALLURGY; SEALINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS; WORKING METALLIC POWDER

To provide a fusible plug suitable for a safety device for a high-pressure gas container.SOLUTION: A fusible plug for a high-pressure gas container has a communication hole filled with a low-melting-point alloy, where a porous metal sintered body is press-fitted into at least a part of the communication hole in a length direction, and all or part of the porous metal sintered body is impregnated with the low-melting-point alloy and solidified into a composite state. The low-melting-point alloy is preferably an alloy with a melting point of 110°C. Also, the porous metal sintered body to be press-fitted is preferably a porous metal sintered body having 30% or more and 50% or less of pores in terms of an area ratio, and 80% or more of pores having a diameter of more than 5 μm of all pores in terms of an area ratio. The porous metal sintered body is preferably a porous austenitic stainless steel sintered body.SELECTED DRAWING: Figure 1 【課題】高圧ガス容器用の安全装置として好適な可溶栓を提供する。【解決手段】高圧ガス容器用可溶栓で、低融点合金が充填された連通孔を有し、かつ連通孔の長さ方向の少なくとも一部に多孔質金属焼結体が圧入され、該多孔質金属焼結体の全て又は一部に、低融点合金を含浸させ、固化し複合化した状態となることを特徴とする。低融点合金は融点が110℃である合金とすることが好ましい。また、圧入する多孔質金属焼結体としては、面積率で30％以上50％以下の空孔を有し、かつ該空孔のうち直径5μmを超える空孔を全空孔に対する面積率で80％以上有する多孔質金属焼結体とすることが好ましい。多孔質金属焼結体としては、多孔質オーステナイト系ステンレス鋼焼結体とすることが好ましい。【選択図】図１