JP2007187252A - Drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clean off foreign matter in fluid attached to an outer surface of a spherical valve seat member with a simple structure. <P>SOLUTION: A valve casing is composed of a main body 1 and a cover 2, and provided with an inlet 5, a valve chest 4 and an outlet 7. A spherical valve seat member 9 having a discharge passage 8 connecting the valve chest 4 to an outlet 7 side is rotatably and operatably mounted on the cover 2. A valve shaft rotating and operating the spherical valve seat member 9 from the external is connected with the spherical valve seat member 9. A float 11 as a valve member opening and closing the discharge passage 8 by being sit on and separated from the spherical valve seat member 9, is disposed in the valve chest 4. A blade member 17 is disposed on the cover 2 so that the outer surface of the spherical valve seat member 9 rubs therewith when the spherical valve seat member 9 is rotated by rotating and operating the valve shaft from the external, thus the foreign matter in the fluid attached to the outer surface of the spherical valve seat member 9 is removed. <P>COPYRIGHT: (C)2007,JPO&INPIT

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 the 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 that communicates with the valve chamber on 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 when the discharge passage of the spherical valve seat member faces the polishing member, the polishing member comes into contact with the spherical valve seat member from the outside and the polishing member is rotated. First, the valve shaft is rotated so that the discharge passage of the spherical valve seat member faces the polishing member, and then the operating 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.

The conventional drain trap includes a valve shaft for rotating the spherical valve seat member for cleaning foreign matter adhering to the outer surface of the spherical valve seat member, and an operation shaft for pressing and rotating the polishing member. Need. Therefore, there is a problem that the number of parts is large and the structure is complicated.
Japanese Patent No. 2711606

  The problem to be solved is to enable cleaning of foreign matters in the fluid attached to the outer surface of the spherical valve seat member with a simple structure.

  According to the present invention, 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 with the outlet side is attached to the valve casing so as to be rotatable, and the spherical valve seat member is externally attached. The valve shaft to be rotated is connected to a spherical valve seat member, and a valve member that opens and closes the discharge passage by being seated on and off the spherical valve seat member is arranged in the valve chamber. The valve casing is provided with a blade member that rubs the outer surface of the spherical valve seat member when the seat member is rotated.

  In the present invention, since the foreign matter in the fluid adhering to the outer surface of the spherical valve seat member can be removed by the blade member by rotating the valve shaft from the outside and rotating the spherical valve seat member, the spherical member has a simple structure. The outstanding effect that the foreign material in the fluid adhering to the outer surface of the valve seat member can be cleaned is produced.

  The drain trap of the present invention is provided with a blade member on the valve casing that rubs the outer surface of the spherical valve seat member when the spherical valve seat member is rotated by rotating the valve shaft from the outside. Therefore, by rotating the valve shaft from the outside to rotate the spherical valve seat member, the outer surface of the spherical valve seat member rubs the blade member, and foreign matters in the fluid adhering to the outer surface of the spherical valve seat member are deleted. Is done. As described above, the foreign matter in the fluid attached to the outer surface of the spherical valve seat member can be cleaned only by rotating the valve shaft.

  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 front-end seal ring 14, a spherical valve seat member 9, and a rear-end seal ring 15 are inserted into a valve seat mounting hole 13 provided in the lid 2 below the valve chamber 4, and held by a plug 16 screwed to the lid 2. And attach. A valve shaft (not shown) for rotating the spherical valve seat member 9 from the outside is connected to the spherical valve seat member 9 through the lid 2 from the front side of the drawing. A blade member 17 having an inner surface with a shape along the outer surface of the spherical valve seat member 9 is integrally formed at the valve chamber 4 side end of the lid 2 holding the distal end side seal ring 14. The blade member 17 may be formed separately and attached to the lid 2. The blade member 17 rubs the outer surface of the spherical valve seat member 9 when the spherical valve seat member 9 is rotated by rotating the valve shaft from the outside, and foreign matter in the fluid attached to the outer surface of the spherical valve seat member 9 Is deleted.

  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 serving as a valve member that opens and closes the discharge passage 8 by being seated on the valve chamber side end face 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, 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.

  When cleaning the foreign matter adhering to the outer surface of the spherical valve seat member 9, the spherical valve seat member 9 is rotated by rotating a valve shaft (not shown) from the outside. By rotating the spherical valve seat member 9, the outer surface of the spherical valve seat member 9 rubs against the inner surface of the blade member 17. Thereby, the foreign material in the fluid adhering to the outer surface of the spherical valve seat member 9 is deleted by the blade member 17.

It is sectional drawing of the float type drain trap of this invention. It is an expanded sectional view of the spherical valve seat member part of FIG.

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 17 Blade member

Claims (1)

A valve that forms an inlet, a valve chamber, and an outlet in the valve casing, a spherical valve seat member having a discharge passage communicating with the valve chamber on the outlet side is attached to the valve casing so as to be rotatable, and the spherical valve seat member is rotated from the outside. The shaft is connected to the spherical valve seat member, and the valve member that opens and closes the discharge passage by seating on and off the spherical valve seat member is arranged in the valve chamber, and the spherical valve seat member is rotated by rotating the valve shaft from the outside. A drain trap, characterized in that a blade member that rubs the outer surface of a spherical valve seat member when provided is provided in the valve casing.

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