JP2007046740A - Float type drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove foreign matter deposited on a float outer surface and an inner wall of a valve port. <P>SOLUTION: A valve casing is formed of a main body 1 and a lid 2, and an inlet 5, a valve chamber 4, and an outlet 7 are formed on the valve casing. A valve seat member 8 having a valve port 12 communicating the valve chamber 4 and the outlet 7 is mounted on the lower part of the valve chamber 4. The float 17 for separating from/seating on the valve seat member 8 and opening/closing the valve port 12 is arranged in a free state in the valve chamber 4. The inlet 5 is connected to inlet piping 21. Cleaning piping 22 branching from the inlet piping 21 is connected to the inlet piping 21. A cleaning nozzle 23 is attached to the cleaning piping 22, and the cleaning nozzle 23 is threadedly connected to the main body 1. The cleaning nozzle 23 injects fluid in the inlet piping 21 from the outlet 7 side of the valve port 12 toward the inside of the valve chamber 4 via the valve port 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a float-type drain trap that discharges steam, compressed air, or drain generated in a gas piping system by opening and closing a valve port by floating up and down of the float, and particularly iron that adheres to the outer surface of the float or the inner wall of the valve port. It relates to things that can remove foreign matters such as powder and scales.

  Conventional float drain traps have a valve casing that forms an inlet, a valve chamber, and an outlet, and a valve seat that opens the valve port that connects the valve chamber and the outlet. A cleaning nozzle that injects a fluid between the valve chamber side wall and the float outer surface. It is provided.

The above-mentioned conventional float type drain trap removes foreign matters such as iron powder and scales adhering to the outer surface of the float by injecting fluid from the cleaning nozzle toward the valve chamber side wall and the outer surface of the float. it can. However, since the foreign matter adhering to the inner wall of the valve port cannot be removed, there is a problem that the foreign matter accumulates on the inner wall of the valve port and the passage area is narrowed, and the drain discharge flow rate is reduced.
Japanese Utility Model Publication No. 6-19919

  The problem to be solved is to be able to remove foreign substances adhering to the outer surface of the float and the inner wall of the valve opening.

  According to the present invention, a valve seat member having an inlet, a valve chamber, and an outlet formed in a valve casing and having a valve port that communicates the valve chamber and the outlet is provided at a lower portion of the valve chamber, and a float is disposed in the valve chamber in a free state. A cleaning nozzle for injecting fluid from the outlet side of the valve port to the valve chamber is provided in the case where the outer surface of the float is lifted and lowered to open and close the valve seat member to open and close the valve port. It is characterized by that.

  According to the present invention, foreign matter adhering to the outer surface of the float and the inner wall of the valve port can be removed, so that foreign matter does not accumulate on the inner wall of the valve port and the passage area is not reduced. Therefore, the excellent effect that the drain discharge flow rate does not decrease is produced.

  The float drain trap of the present invention can remove foreign matter adhering to the inner wall of the valve port and the outer surface of the float by injecting fluid from the cleaning nozzle from the outlet side of the valve port toward the valve chamber through the valve port. it can.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A lid 2 is fastened to the main body 1 with a bolt to form a valve casing, and a valve chamber 4 is formed inside. An inlet 5 is opened at the top of the valve chamber 4. Between the inlet 5 and the valve chamber 4, a cylindrical screen 6 for capturing a foreign substance having a large number of small holes is disposed. An outlet 7 is formed on the same axis as the inlet 5. A valve seat member 8 having a valve port 12 communicating with the valve chamber 4 and the outlet 7 from the valve seat mounting port 10 is screwed to the lower portion of the main body 1, and the valve seat mounting port 10 is closed with a cleaning nozzle 23. A hollow spherical float 17 that opens and closes the valve port 12 by being seated on and off the valve seat member 8 is disposed in the valve chamber 4 in a free state.

  The inlet 5 is connected to the inlet pipe 21. A cleaning pipe 22 branched from the inlet pipe 21 is connected to the inlet pipe 21, and the cleaning pipe 22 is connected to the cleaning nozzle 23. The cleaning nozzle 23 injects the fluid in the inlet pipe 21 from the outlet 7 side of the valve port 12 into the valve chamber 4. An opening / closing valve 24 is disposed on the downstream side of the branch portion of the cleaning pipe 22 of the inlet piping 21, and an opening / closing valve 25 is disposed in the cleaning pipe 22.

  Usually, the on-off valve 24 is opened and the on-off valve 25 is closed. Drain that flows in from the inlet 5 accumulates in the valve chamber 4, and the float 17 rises and falls according to the liquid level and is seated on and off the valve seat member 8 to open and close the valve port 12. When the valve port 12 is opened, drain in the valve chamber 4 is discharged to the outlet 7 through the valve port 12, and when the valve port 12 is closed, leakage of steam, compressed air, and gas in the valve chamber 4 is prevented. .

  When removing foreign matter adhering to the outer surface of the float and the inner wall of the valve opening, first, the on-off valve 24 and the on-off valve 25 are both closed, and the pressure on the downstream side of the on-off valve 24 and on-off valve 25 is reduced. Thereafter, the on-off valve 25 is opened, and the fluid in the inlet pipe 21 is injected from the cleaning nozzle 23 through the cleaning pipe 22 into the valve chamber 4 from the outlet 7 side of the valve opening 12 through the valve opening 7. Thereby, the foreign material adhering to the float outer surface and the valve port 12 inner wall is removed.

Sectional drawing of the float type drain trap of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 4 Valve chamber 5 Inlet 7 Outlet 8 Valve seat member 12 Valve port 17 Float 18 Operation rod 21 Inlet piping 22 Cleaning piping 23 Cleaning nozzle

Claims (1)

A valve seat member that forms an inlet, a valve chamber, and an outlet in the valve casing, and that has a valve port that communicates the valve chamber and the outlet is provided in the lower part of the valve chamber. When the lower surface of the valve seat member is opened and closed by lowering and opening and closing the valve port, a cleaning nozzle for injecting fluid from the outlet side of the valve port to the valve chamber is provided. Float type drain trap.

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