Method for supplying inert gas into poppet valve intermediate and apparatus for supplying inert gas into poppet valve intermediate
AssigneeNittan Valve Co., Ltd.
InventorsHisanaga Yokoyama, Shigeru Uchida
Life of this patent
Estimating the term…
Abstract
A method and an apparatus for supplying inert gas into a poppet valve intermediate are provided that are capable of properly filling the inert gas without waste into the poppet valve intermediate of any size. After a negative pressure is achieved by suction in an internal space (Win) of a poppet valve intermediate (W) as compared to an ambient pressure (Pa) of the poppet valve intermediate (W), the inert gas is supplied into the internal space (Win) until a pressure (F) of the internal space (Win) reaches the ambient pressure (Ps) of the poppet valve intermediate (W).
Claims21
A method for supplying inert gas into a poppet valve intermediate with a supply/discharge adjuster, the poppet valve intermediate having an internal space with an opening on one axial end side, and being arranged with the opening on one axial end side facing upward, the supply/discharge adjuster supplying inert gas to the opening on one axial end side of the poppet valve intermediate before a cooling medium metal is supplied into the internal space of the poppet valve intermediate, comprising the steps of:
- closing the opening on the one axial end side of the poppet valve intermediate with the supply/discharge adjuster,
- achieving a negative pressure by negative-pressure suction in the internal space of the poppet valve intermediate as compared to an ambient pressure of the poppet valve intermediate, and
- supplying the inert gas from the supply/discharge adjuster to the internal space until a pressure of the internal space reaches the ambient pressure of the poppet valve intermediate.
An apparatus for supplying inert gas into a poppet valve intermediate in which an object to be supplied with inert gas is a poppet valve intermediate having an internal space with an opening on one axial end side, the apparatus having a support supporting the poppet valve intermediate with the opening on one axial end side facing upward, the inert gas being supplied from the opening on one axial end side of the poppet valve intermediate into the internal space of the poppet valve intermediate while the poppet valve intermediate is supported by the support, the apparatus comprising:
- a supply/discharge adjuster arranged to be capable of coming into contact with and separating from an opening circumferential edge portion on one axial end side of the poppet valve intermediate, the supply/discharge adjuster closing the opening on one axial end side when coming into contact with the opening circumferential edge portion on one axial end side of the poppet valve intermediate, wherein
- the supply/discharge adjuster is set to have achievable switching forms including a negative-pressure suction form and an inert gas supply form, wherein in the negative-pressure suction form, when the supply/discharge adjuster is located on the opening circumferential edge portion on one axial end side of the poppet valve intermediate, negative-pressure suction is performed in the internal space of the poppet valve intermediate until reaching a setting pressure lower than an ambient pressure of the poppet valve intermediate, and wherein in the inert gas supply form, when the pressure inside the internal space of the poppet valve intermediate reaches the setting pressure due to the negative-pressure suction form, the inert gas is supplied into the internal space of the poppet valve intermediate until the pressure inside the internal space reaches the ambient pressure of the poppet valve intermediate.
Dependencies are inferred from the claim text.