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Gate valve

  • US 9,429,239 B2
  • Filed: 04/08/2013
  • Issued: 08/30/2016
  • Est. Priority Date: 04/06/2012
  • Status: Active Grant
First Claim
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1. A gate valve, comprising:

  • a valve blade 120 which comes into close contact with a valve seat 111 formed around an opening 112 in a valve housing 110 and is configured to close the opening 112 from an inside of the valve housing 110;

    a valve rod 130 which is connected to the valve blade 120 and sealingly protrudes by way of a bellows 131 from the inside of the valve housing 110 to an outside of the valve housing and which moves in an upward and a downward direction and in a horizontal direction;

    a guide housing 140, comprising an upward and downward driving section groove 143 which is connected to an outer side of the valve housing 110, formed upward and downward, and an L-motion block guide groove 142 which comprises an opening and closing driving section groove 144 that is horizontally formed in series with the upward and downward driving section groove 143 in a horizontal closing direction “

    C”

    ;

    an L-motion block 150, comprising a guide roller 151, which is connected to the valve rod 130, and at both sides of which a guide roller 151 is inserted and driven into the L-motion block guide groove 142;

    a driving block 160 which is connected to the L-motion Block 150 through a plurality of links 155, wherein more than one link 155 is connected on an upper side and a lower side of the L-motion block 150, respectively;

    a tensile elasticity means 170, more than one of which are installed between the L-motion block 150 and the driving block 160; and

    an upward and downward driving unit 180 which is configured to drive the driving block 160 upwards and downwards.

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