JP2007303632A - Float type steam trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clean up foreign matters deposited on the inner face of a discharge passage of a valve seat member by automatically moving an operating member forward and backward. <P>SOLUTION: A body 1 and a cover 2 form a valve casing. The valve casing has an inlet 5, a valve chest 4 and an outlet 7. The valve seat member 9 is mounted on the lower part of the valve chest 4. The valve seat member 9 has the discharge passage 8 for communicating the valve chest 4 with the side of the outlet 7. In the valve chest 4, a float 11 is arranged which is seated on/off the valve seat member 9 to open/close the discharge passage 8. In the discharge passage 8, the operating member 16 is arranged to be movable forward and backward. A bimetal 17 as a temperature reacting member is connected to the operating member 16. The bimetal 17 is arranged in a sealed primary side storage chamber 14 communicated with the valve chest 4. With the deformation of the bimetal 17, the operating member 16 is moved forward at a low temperature and moved backward at a high temperature. The operating member 16 is moved forward to clean up the foreign matters deposited on the inner face of the discharge passage 8 of the valve seat member 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a float type steam trap that automatically discharges drain generated in a steam piping system by floating up and down of a float, and in particular, cleans foreign matter in a fluid adhering to an inner surface of a discharge passage of a valve seat member on which a float is separated. It relates to what can be done.

  In the conventional float trap, an inlet, a valve chamber, and an outlet are formed by a valve casing, a valve seat member is attached to a lower portion of the valve chamber, and a discharge passage that communicates the valve chamber to the outlet side is formed in the valve seat member. A float that opens and closes the discharge passage by seating on and off the valve seat member is arranged in the room, and an operation member that can be moved forward and backward from the outside is arranged in the discharge passage. It cleans up foreign matter adhering to the inner surface of the discharge passage.

Since the conventional float type trap manually moves the operating member back and forth, there is a problem that it takes a lot of time to clean the foreign matter adhering to the inner surface of the discharge passage of the valve seat member.
Japanese Utility Model Publication No. 49-36747

  The problem to be solved is to automatically move the operating member back and forth so that foreign matter adhering to the inner surface of the discharge passage of the valve seat member can be cleaned.

  In the present invention, an inlet, a valve chamber, and an outlet are formed in a valve casing, a valve seat member is attached to a lower portion of the valve chamber, a discharge passage that communicates the valve chamber with the outlet side is formed in the valve seat member, and the valve chamber A float that opens and closes the discharge passage by being seated on and off the seat member, an operation member that can be advanced and retracted is disposed in the discharge passage, and the foreign matter attached to the inner surface of the discharge passage of the valve seat member is cleaned by the advancement and retraction of the operation member The temperature responsive member is connected to the operation member, and the temperature responsive member is disposed in the sealed primary storage chamber communicating with the valve chamber, and the operation member is advanced at a low temperature and retreated at a high temperature by deformation of the temperature responsive member. Features.

  In the present invention, the operation member is advanced at a low temperature by deformation of the temperature-responsive member disposed in the sealed primary storage chamber communicating with the valve chamber, so that the foreign matter adhering to the inner surface of the discharge passage of the valve seat member is automatically removed. The effect that it can be cleaned automatically is produced.

  The float type steam trap of the present invention has a temperature responsive member connected to an operation member, and the temperature responsive member is disposed in a sealed primary storage chamber communicating with a valve chamber, and the operation member is advanced at a low temperature by deformation of the temperature responsive member. And retreat at high temperatures. Therefore, if the float type steam trap normally discharges the drain, the temperature responsive member arranged in the hermetic primary storage chamber communicating with the valve chamber is kept at a high temperature to retract the operation member. When foreign matter adheres to the inner surface of the discharge passage of the valve seat member and the drain cannot be discharged, the temperature responsive member disposed in the sealed primary storage chamber communicating with the valve chamber becomes low temperature, and the operation member is advanced to advance the valve. The foreign matter adhering to the inner surface of the discharge passage of the seat member is cleaned.

  An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). A lid 2 is fastened to the main body 1 with bolts 3 to form a valve casing, and a valve chamber 4 is formed inside. The main body 1 has an inlet 5, an outlet passage 6 and an outlet 7, and the inlet 5 communicates with the upper portion of the valve chamber 4. The inlet 5 and the outlet 7 are formed on the same axis. A valve seat member 9 having a discharge passage 8 is screwed to the lid 2 at the bottom of the valve chamber 4. The discharge passage 8 includes a small-diameter leading end portion 8a at the end of the valve chamber 4, a tapered portion 8b having a diameter increasing toward the downstream downstream of the leading end portion 8a, and a large-diameter rear end portion 8c downstream of the tapered portion 8b. Become. The lid 2 has an outlet passage 10, and the lower portion of the valve chamber 4 communicates from the discharge passage 8 to the outlet 7 through the outlet passages 10 and 6. A hollow spherical float 11 that opens and closes the discharge passage 8 by being seated on the valve chamber side end surface 9a of the valve seat member 9 is disposed in the valve chamber 4 in a free state. Two float seats 12 with which the float 11 abuts at the position where the discharge passage 8 is closed are provided below the float 11 on the side facing the front side of the drawing.

  A plug 13 is screwed to the lid 2 on the same axis as the valve seat member 9. A guide rod 15 in a sealed primary-side accommodation chamber 14 formed by the lid 2 and the plug 13, an operation member 16 that covers the guide rod 15 and covers the tip of the guide rod 15, and around the guide rod 15 and the operation member 16 The bimetal 17 as a temperature responsive member arrange | positioned in is accommodated. The valve chamber 4 and the primary side accommodation chamber 14 are communicated with each other through a communication passage 26. The bimetal 17 is formed into a double helical winding shape in which a long strip-shaped plate material is formed into a helical winding shape and further into a helical winding shape. The guide bar 15 has a substantially semi-disc shaped claw portion 18 and a large diameter portion 19, and the bimetal 17 is floated and fixed between the claw portion 18 and the large diameter portion 19. The operation member 16 has a substantially semi-disc shaped claw portion 21 and a large diameter portion 22, and the bimetal 17 float 11 side is wound between the claw portion 21 and the large diameter portion 22 and fixed. The guide rod 15 fixes the large-diameter portion 19 by a fixing member 24 and a press-fitting member 25 screwed into the lateral hole 23 of the plug 13. The operating member 16 is positioned in the rear end portion 8c of the discharge passage 8 when the front end portion 16a protrudes into the valve chamber 4 when it moves forward. The outer diameter of the distal end portion 16a of the operating member 16 is formed to be slightly smaller than the inner diameter of the distal end portion 8a of the discharge passage 8, and the inner surface of the distal end portion 8a of the discharge passage 8 is cleaned by the distal end portion 16a by advancement.

  Drain flowing in from the inlet 5 accumulates in the valve chamber 4, and the float 11 rises and falls according to the liquid level and is seated on and off the valve seat member 9 to open and close the discharge passage 8. When the discharge passage 8 is opened, drain in the valve chamber 4 is discharged to the outlet 7 through the discharge passage 8 and the outlet passages 6 and 10, and when the discharge passage 8 is closed, leakage of gas in the valve chamber 4 is prevented. If the drain is normally discharged, the bimetal 17 disposed in the sealed primary-side accommodation chamber 14 communicating with the valve chamber 4 is maintained at a high temperature, and the operation member 16 is moved backward.

  When foreign matter adheres to the inner surface of the distal end 8a of the discharge passage 8 of the valve seat member 9 and the drain cannot be discharged normally, the bimetal 17 disposed in the sealed primary storage chamber 14 communicating with the valve chamber 4 becomes low temperature. The operation member 16 is advanced. As a result, the inner surface of the distal end portion 8 a of the discharge passage 8 of the valve seat member 9 is cleaned by the distal end portion 16 a of the operation member 16.

Sectional drawing of the float type steam trap of this invention. The expanded sectional view of the bimetal part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 4 Valve chamber 5 Inlet 7 Outlet 8 Discharge passage 8a The front-end | tip part of a discharge passage 9 Valve seat member 11 Float 14 Primary side storage chamber 16 Operation member 16a Front-end | tip part 17 of an operation member

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet, a valve seat member is attached to the lower portion of the valve chamber, a discharge passage that communicates the valve chamber with the outlet side is formed in the valve seat member, and the valve seat member is separated from the valve seat member. An operation member for arranging a float that opens and closes the discharge passage, arranges an operation member that can advance and retreat in the discharge passage, and cleans foreign matter adhering to the inner surface of the discharge passage of the valve seat member by the advancement and retraction of the operation member. The float is characterized in that a temperature responsive member is connected to the valve chamber, the temperature responsive member is disposed in a sealed primary storage chamber communicating with the valve chamber, and the operation member is advanced at a low temperature and retreated at a high temperature by deformation of the temperature responsive member. Formula steam trap.

Images