Water hammer absorption device and manufacturing method of same

A water hammer absorption device, provided with a movable water plug slidable inside a water hammer pipe, both ends of said water hammer pipe respectively in connection with a joint and cover, said joint adapted to be connected with a connecting pipe, and said cover closing said water hammer pipe, characterized in that:

• a bottom wall is provided inside the side of said water hammer pipe opposite to said joint, said bottom wall is provided with a mounting hole and a plurality of filling holes, a non-return diaphragm is assembled inside said water hammer pipe, said non-return diaphragm is adapted to shield said filling holes of said bottom wall of said water hammer pipe, and said non-return diaphragm is provided with a rod configured in said mounting hole;
• high-pressure air is removed after injected into an internal space of said water hammer pipe, allowing high pressure to be generated inside said water hammer pipe, and said non-return diaphragm to attach to and cover said bottom wall and said plurality of filling holes, preventing said high-pressure air from leaking out, and closing the side of said water hammer pipe having non-return diaphragm through said cover, thereby strengthening the airtightness of said internal space.