Single sash two-way pressure bearing regulating main air door of coal mine

Single sash two-way pressure bearing regulating main air door of coal mine

  • CN 2,795,445 Y
  • Filed: 06/07/2005
  • Issued: 07/12/2006
  • Est. Priority Date: 06/07/2005
  • Status: Active Grant
First Claim
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1. , the single fan of a kind of coal mine ventilation bidirectional bearing is regulated the main air door, comprise support, pipeline and door leaf, it is characterized in that:

  • door leaf is positioned within the pipeline, and it is identical with the shape of cross section of pipeline, door-hinge is arranged on the door leaf symmetry center line, be provided with and the suitable axis hole of door-hinge on the duct wall, wherein the door-hinge of a side stretches out outside the pipeline, the door-hinge external part fixedly installs control stick, and when control stick was positioned at top dead centre, door leaf was in complete fastening position, after control stick revolves and turn 90 degrees, when being positioned at lower dead center, door leaf is in full open position, and described control stick is provided with positioner.

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