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GATE VALVE

  • US 20120161055A1
  • Filed: 09/03/2010
  • Published: 06/28/2012
  • Est. Priority Date: 09/03/2009
  • Status: Active Grant
First Claim
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1. A gate valve comprising:

  • a valve box comprising;

    a hollow portion;

    a first opening portion and a second opening portion that are provided so as to sandwich the hollow portion;

    an inner surface formed around the first opening portion; and

    a flow passage passing through the hollow portion, the first opening portion, and the second opening portion;

    a support body disposed inside the hollow portion;

    a valve plate comprising;

    a fixed valving section that is securely fixed to the support body;

    a movable valving section disposed so as to surround the outer-periphery of the fixed valving section;

    a first peripheral region; and

    a second peripheral region, the movable valving section sliding in a direction in which the flow passage is extended;

    a first biasing section disposed at the first peripheral region, allowing the movable valving section to move toward the first opening portion, allowing the movable valving section to come into contact with the inner surface, pressing the movable valving section onto the inner surface, and closing the flow passage; and

    a second biasing section disposed at the second peripheral region, allowing the movable valving section to move toward the second opening portion, and releasing the flow passage by separating the movable valving section from the inner surface.

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