Check valve for supercritical gas injection

Check valve for supercritical gas injection

CN
  • CN 102,829,220 A
  • Filed: 08/29/2012
  • Published: 12/19/2012
  • Est. Priority Date: 08/29/2012
  • Status: Active Application
First Claim
Patent Images

1. a supercritical gas injection one-way valve is used for cellular plastic extruding and moulding and process of injection molding and injects supercritical CO 2Or N 2It is characterized in that comprising spool, valve seat, spring seat and pressure spring;

  • Have the hollow part in the valve seat, a hollow part part can move axially in valve seat through cylndrical surface Spielpassung and spool with spool, and the hollow space that is positioned at top, said cylndrical surface in the valve seat is used to hold spring seat, spring and spool;

    The upper end of spool is connected with spring seat, and length of spring compressed is between spring seat and top, said cylndrical surface;

    The hollow space that is positioned at below, said cylndrical surface in the valve seat has the frustoconic shape side inner walls, and the top of frustoconic shape side inner walls is connected with said cylndrical surface, and the lower end of spool has the frustoconic shape outer side surface that seals when contacting with said frustoconic shape side inner walls;

    Have the passage of supercritical gas in the said spool, this passage one end passes spring seat, and the other end is positioned at the frustoconic shape outer side surface top of spool.

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