JP4890129B2 - Drain trap - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a drain trap that automatically discharges steam, compressed air, and drain generated in a gas piping system, and in particular, can clean foreign matter in a fluid adhering to the outer surface of a valve seat member on which a valve member is seated. About.

  In a conventional drain trap, a spherical valve seat member having a discharge passage that forms an inlet, a valve chamber, and an outlet in a valve casing and communicates the valve chamber to the outlet side is attached to the valve casing so as to be rotatable. A valve shaft that is rotated from the outside is connected to the spherical valve seat member, a valve member that opens and closes the spherical valve seat member and opens and closes the discharge passage is disposed in the valve chamber, and the polishing member is opposed to the spherical valve seat member. An operating shaft that is arranged to rotate the valve shaft from the outside so that the discharge passage of the spherical valve seat member faces the polishing member so that the polishing member abuts the spherical valve seat member from the outside and rotates the polishing member. First, the valve shaft is rotated so that the discharge passage of the spherical valve seat member faces the polishing member, and then the operation shaft is pressed to apply the polishing member to the spherical valve seat member. After that, rotate the operation shaft. By for rotating the polishing member, it is to clean the foreign matter in the fluid adhering to the outer surface of the spherical valve seat member.

In the conventional drain trap, the spherical valve seat member and the polishing member are manually rotated in order to clean the foreign matter in the fluid adhering to the outer surface of the spherical valve seat member. Therefore, there has been a problem that it takes a hand gap to clean the foreign matter in the fluid adhering to the outer surface of the valve seat member.
Japanese Patent No. 2711606

Problem to be solved is to be able to clean the automatic foreign matter in the fluid adhered to the tapered portion outer surface of the tip portion of the valve seat member.

The present invention relates to a valve seat member in which an inlet, a valve chamber, and an outlet are formed in a valve casing, a discharge passage that communicates the valve chamber with the outlet side, a tip portion protruding into the valve chamber, and a tapered portion on the outer surface of the tip portion Is disposed in the through hole of the valve casing obliquely upward in the lower part of the valve chamber, and a float as a valve member that opens and closes the discharge passage by opening and closing on the tip surface of the valve seat member in the valve chamber, The valve seat member has a spiral groove on the inner surface of the discharge passage and is locked to the through-hole by a snap ring interposed between the outer peripheral wall and the inner peripheral wall of the through-hole, and thereby around the axis of the discharge passage. is rotatably supported, is in the drain trap, characterized in that a cleaning member for rubbing the tapered portion outer surface of the tip portion of the valve seat member when the valve seat member is rotated.

The present invention, since the one in which rubbing the tapered portion outer surface of the tip portion of the valve seat member when the valve seat member is rotated, the foreign matter in the fluid adhered to the tapered portion outer surface of the tip portion of the valve seat member Produces an excellent effect of automatically cleaning.

In the drain trap of the present invention, the valve seat member has a spiral groove on the inner surface of the discharge passage, and is locked to the through hole by a snap ring interposed between the outer peripheral wall and the inner peripheral wall of the through hole. it is rotatably supported about the axis of the discharge passage, in which the valve seat member provided with a cleaning member for rubbing the tapered portion outer surface of the tip portion of the valve seat member when it is rotated. Therefore, rubbing the tapered portion outer surface of the tip portion of the valve seat member when the valve seat member is rotated. Therefore, the foreign matter in the fluid adhered to the tapered portion outer surface of the tip portion of the valve seat member can clean automatically.

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. 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 for communicating the valve chamber 4 to the outlet 7 side is disposed in the through hole 3 of the lid 2. The distal end portion 13 of the valve seat member 9 projects into the valve chamber 4. The valve seat member 9 is disposed in the through hole 3 of the lid 2 so as to be obliquely upward at the lower part of the valve chamber 4. The valve seat member 9 has a spiral groove 14 on the inner surface of the discharge passage 8 and is locked to the through hole 3 by a snap ring 15 interposed between the outer peripheral wall and the inner peripheral wall of the through hole 3. The force of the discharge drain flowing down the discharge passage 8 is converted into a force for rotating the valve seat member 9 by the action of the spiral groove 14 provided in the valve seat member 9, so that the valve seat member 9 has the axial center of the discharge passage 8. Rotate around. A disc 16 such as PTFE is interposed between the valve seat member 9 and the lid 2 to keep both airtight, reduce rotational resistance, and prevent seizure. A blade 18 as a cleaning member that comes into contact with the outer surface of the tapered portion 17 of the distal end portion 13 of the valve seat member 9 is attached to the lid 2 with a screw 19. The blade 18 as a cleaning member rubs the outer surface of the tapered portion 17 of the tip portion 13 when the valve seat member 9 is rotated by the discharge drain, and the foreign matter in the fluid attached to the outer surface of the tapered portion 17 of the tip portion 13. To clean.

  The lid 2 has an outlet passage 10. The lower part of the valve chamber 4 communicates from the discharge passage 8 to the outlet 7 through the through hole 3 and the outlet passages 10 and 6. A hollow spherical float 11 serving as a valve member that opens and closes the discharge passage 8 by being seated on the distal end surface of the distal end portion 13 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.

  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, the drain in the valve chamber 4 is discharged to the outlet 7 through the discharge passage 8, the through hole 3, the outlet passages 6, 10, and when the discharge passage 8 is closed, the gas in the valve chamber 4 leaks. Is prevented.

  When the valve seat member 9 rotates around the axis of the discharge passage 8 by the discharge drain flowing down the discharge passage 8, the blade 18 as a cleaning member rubs the outer surface of the tapered portion 17 of the tip portion 13 of the valve seat member 9. The foreign matter in the fluid adhering to the outer surface of the tapered portion 17 of the distal end portion 13 of the valve seat member 9 is cleaned.

It is sectional drawing of the float type drain trap of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 4 Valve chamber 5 Inlet 7 Outlet 8 Discharge passage 9 Valve seat member 11 Float 13 Valve seat member tip part 14 Spiral groove 17 Tapered part 18 of valve seat member tip part Cutting tool as cleaning member

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet , a valve seat member having a discharge passage that communicates the valve chamber with the outlet side, a tip portion protruding into the valve chamber, and a tapered portion on the outer surface of the tip portion . place the through hole of the valve housing obliquely upward in the lower part, in that arranged float as a valve member for opening and closing the discharge passage and away seated on the distal end surface of the valve seat member in the valve chamber, the valve seat member A spiral groove is formed on the inner surface of the discharge passage, and it is supported by the snap ring interposed between the outer peripheral wall and the inner peripheral wall of the through hole so as to be rotatable about the axis of the discharge passage. is, drain trap, characterized in that a cleaning member for rubbing the tapered portion outer surface of the tip portion of the valve seat member when the valve seat member is rotated.

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