JP2008309290A - Orifice steam trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an orifice steam trap capable of effectively eliminating foreign material for an orifice, adjusting the condensate discharge flow rate of the orifice, and blocking up the orifice. <P>SOLUTION: There is provided a partition 4 having the orifice 5 between an inlet 2 and an outlet 3 formed in a trap casing 1 to discharge the condensate of the inlet 2 side out of the orifice 5 into the outlet 3 side. By advancing and retreating action of the trap casing 1 for a screw portion 9 formed in the trap casing 1 from outside, a foreign material eliminating member 7 is formed to eliminate the foreign material of the orifice 5 by advancing and retreating through the orifice 5 in the axial direction of the orifice 5 so as to adjust the condensate discharge flow rate of the orifice 5 by the advancing and retreating position of the foreign material eliminating member 7 and block up the orifice 5 at the most advancing position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an orifice type steam trap that automatically discharges condensate condensed with steam generated in a steam piping system such as a steam transport pipe or steam using a system from the orifice. It is related with the thing provided with the foreign material exclusion member which excludes.

  Conventional orifice type steam traps are provided with an orifice in the partition between the inlet and outlet formed in the trap casing, and the condensate on the inlet side is discharged from the orifice to the outlet side. The foreign substance exclusion member to be disposed is arranged in the orifice.

The conventional orifice type steam trap automatically removes foreign matter adhering to and depositing on the orifice when the foreign matter removing member disposed in the orifice rolls by condensate passing through the orifice. However, there is a problem that foreign matter having a large adhesion force to the orifice and foreign matter having a large weight cannot be excluded. Further, there is a problem that the condensate discharge flow rate of the orifice cannot be adjusted according to the amount of condensate to be discharged. In addition, there is a problem that the orifice cannot be closed.
JP 2001-27391 A

  The problem to be solved is to provide an orifice type steam trap capable of effectively removing foreign matters from the orifice, adjusting the condensate discharge flow rate of the orifice and closing the orifice.

  The present invention provides an orifice in a partition between an inlet and an outlet formed in a trap casing, and discharges condensate on the inlet side from the orifice to the outlet side. From the outside of the trap casing with respect to a screw portion formed in the trap casing. A foreign matter removal member is provided to remove the foreign matter from the orifice by moving back and forth in the axial direction of the orifice by moving the screw forward and backward. It is characterized by closing.

  The present invention produces an excellent effect that foreign matter having a large adhesion force and heavy foreign matter can be effectively eliminated by moving the foreign matter exclusion member forward with a large forward force by a screw advance / retreat operation. In addition, it is possible to adjust the condensate discharge flow rate of the orifice according to the advance / retreat position of the foreign substance removing member and to produce an excellent effect that the orifice can be closed at the most advanced position.

  The orifice type steam trap of the present invention is provided with a foreign matter removing member that removes foreign matter from the orifice by moving back and forth in the axial direction of the orifice by the screw advance and retreat operation from the outside of the trap casing with respect to the screw portion formed in the trap casing, The condensate discharge flow rate of the orifice is adjusted according to the advance / retreat position of the foreign matter removing member. Therefore, the foreign matter exclusion member can be moved forward with a large forward force by the screw advance / retreat operation, and foreign matter having a large adhesion force or heavy weight can be effectively eliminated. Further, the condensate discharge flow rate of the orifice can be adjusted by adjusting the area of the flow path between the orifice and the foreign matter removing member according to the advance / retreat position of the foreign matter removing member.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). An inlet 2 and an outlet 3 are formed on the same axis in a trap casing 1 of an orifice type steam trap. A female screw for pipe connection is formed at the inlet 2 and the outlet 3. An orifice 5 is formed in the partition wall 4 between the inlet 2 and the outlet 3 to discharge the condensate on the inlet 2 side to the outlet 3 side. A cylindrical filter 6 having a large number of through holes on the inlet 2 side of the orifice 5 and capturing foreign substances in the condensate is disposed. The inner peripheral side of the filter 6 communicates with the inlet 2 and the outer peripheral side communicates with the outlet 3 through the orifice 5. The filter 6 is formed by laminating metal filter nets or formed of foam metal having a large number of through holes.

  On the outlet 3 side of the orifice 5, a metal foreign material exclusion member 7 having a substantially round bar shape is provided. A screw hole 8 is formed through the upper wall portion of the trap casing 1, and a cylindrical holding member 10 having a screw hole 9 into which the screwed portion of the foreign matter exclusion member 7 can be screwed is screwed into the screw hole 8. The foreign substance exclusion member 7 moves the orifice 5 forward and backward through the forward and backward positions by a screw advance / retreat operation from the outside of the trap casing 1 with respect to the screw hole 9 formed in the cylindrical holding member 10. The foreign matter removing member 7 has a small diameter cylindrical portion 7a slightly smaller than the inner diameter of the orifice 5, a tapered enlarged portion 7b that tapers from the small diameter cylindrical portion 7a in a tapered manner, and a tapered shape. It has a large-diameter portion 7c continuous from the enlarged portion 7b. The foreign matter exclusion member 7 has an operation portion 7d for screwing and unscrewing operation from the outside of the trap casing 1 by an operating tool such as a screwdriver or a torque wrench at the rear end.

  When the foreign object removing member 7 is moved forward and backward by moving the screw forward and backward, the small-diameter cylindrical portion 7a penetrates the orifice 5, and the tapered enlarged portion 7b closes the orifice 5. In the course of the forward movement of the foreign matter removing member 7, foreign matter that has adhered and accumulated on the orifice 5 is removed. Further, when the foreign substance exclusion member 7 is moved forward most, the condensate is accumulated on the inlet 2 side of the orifice 5 by closing the orifice 5 with the tapered enlarged portion 7b. Thereafter, by moving the foreign matter exclusion member 7 backward, the condensate flows down the orifice 5 all at once, and foreign matters that could not be eliminated by the forward movement can be effectively eliminated. Further, the condensate discharge flow rate of the orifice 5 is adjusted by adjusting the flow path area between the orifice 5 and the small-diameter cylindrical portion 7 a according to the advance / retreat position of the foreign substance exclusion member 7. An annular seal member 11 is disposed between the inner peripheral surface of the cylindrical holding member 10 and the outer peripheral surface of the foreign substance exclusion member 7 at the rear portion of the screw hole 9 of the cylindrical holding member 10 and pressed against the cylindrical holding member 10. By screwing the member 12 and pressing the seal member 11, the space between the cylindrical holding member 10 and the foreign matter exclusion member 7 is kept in a watertight state.

  Condensate flowing in from the inlet 2 captures foreign matters such as dust and rust while flowing from the inner peripheral side to the outer peripheral side of the filter 6 and flows down from the orifice 5 to the outlet 3. When fine foreign matter that cannot be captured by the filter 6 adheres and accumulates on the orifice 5, the foreign matter is removed from the orifice 5 by moving the foreign matter removing member 7 forward and backward by moving the screw forward and backward. Further, the flow area between the orifice 5 and the small-diameter cylindrical portion 7a and the tapered enlarged portion 7b is adjusted by adjusting the forward / backward position of the foreign substance exclusion member 7, thereby adjusting the condensate discharge flow rate of the orifice 5 or closing the orifice 5. Or

Sectional drawing of the orifice type steam trap of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trap casing 2 Inlet 3 Outlet 4 Bulkhead 5 Orifice 7 Foreign substance exclusion member 7a Small diameter cylindrical part 7b Tapered enlarged part 9 Screw hole

Claims (1)

In the case where an orifice is provided in the partition between the inlet and outlet formed in the trap casing and the condensate on the inlet side is discharged from the orifice to the outlet side, the screw advancement / retraction operation from the outside of the trap casing to the screw portion formed in the trap casing By providing a foreign matter exclusion member that removes foreign matter from the orifice by moving forward and backward in the axial direction of the orifice, the condensate discharge flow rate of the orifice is adjusted by the forward and backward position of the foreign matter exclusion member, and the orifice is closed at the most advanced position. Orifice type steam trap.

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