JP2008121872A - Drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clean off foreign matters in fluid attached to an outer surface of a spherical valve seat member without removing the spherical valve seat member having a discharge passage and a bypass passage from a valve casing. <P>SOLUTION: The 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. The spherical valve seat member 9 having the discharge passages 8 and 10 and the bypass passage 18 connecting the valve chest 4 to an outlet 7 side is rotatably and operatably mounted on the main body 1. A float 11 as a valve member opening and closing the discharge passages 8 and 10 by seating on and separated from the spherical valve seat member 9, is disposed in the valve chest 4. A valve shaft rotating and operating the spherical valve seat member 9 from the external and rotating the valve chest 4 to a position connected to the outlet 7 side through the discharge passages 8 and 10 or the bypass passage 18 is connected with the spherical valve seat member 9. A blade member 17 is disposed on the main body 1 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. <P>COPYRIGHT: (C)2008,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 a conventional drain trap, a spherical valve seat member having a discharge passage and a bypass passage that communicate with the valve chamber on the outlet side is formed in the valve casing so as to be rotationally operable. A valve member that opens and closes the discharge passage by being seated on and off the spherical valve seat member is arranged, and the spherical valve seat member is rotated from outside to rotate the valve chamber to a position communicating with the outlet side through the discharge passage or bypass passage. The valve shaft is connected to a spherical valve seat member.

The conventional drain trap has a problem that foreign matters in the fluid adhering to the outer surface of the spherical valve seat member cannot be cleaned unless the spherical valve seat member having the discharge passage and the bypass passage is removed from the valve casing. It was.
Japanese Patent No. 2714892

  The problem to be solved is to enable cleaning of foreign matter in the fluid adhering to the outer surface of the spherical valve seat member without removing the spherical valve seat member having the discharge passage and the bypass passage from the valve casing. .

  According to the present invention, a spherical valve seat member having a discharge passage and a bypass passage, which is formed with an inlet, a valve chamber, and an outlet in a valve casing, and communicates with the valve chamber on the outlet side, is attached to the valve casing so as to be rotatable. A valve shaft that displaces and seats on the valve seat member to open and close the discharge passage, rotates the spherical valve seat member from the outside, and rotates the valve chamber to a position that communicates with the outlet side through the discharge passage or bypass passage. Is connected to a spherical valve seat member, and the blade casing is provided with a blade member 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. And

  According to the present invention, the foreign material 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 to rotate the spherical valve seat member having the discharge passage and the bypass passage. Therefore, it is possible to clean the foreign matter in the fluid attached to the outer surface of the spherical valve seat member without removing the spherical valve seat member having the discharge passage and the bypass passage from the valve casing.

  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 having the discharge passage and the bypass passage is rotated by rotating the valve shaft from the outside. Is. 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 main body 1 below the valve chamber 4 and held by a plug 16 screwed to the main body 1. And attach. A valve shaft (not shown) for rotating the spherical valve seat member 9 from the outside passes through the main body 1 from the front side of the paper surface and is connected to the spherical valve seat member 9. A blade member 17 having an inner surface shaped along the outer surface of the spherical valve seat member 9 is integrally formed at the valve chamber 4 side end of the main body 1 holding the distal end side seal ring 14. The blade member 17 may be formed separately and attached to the main body 1. 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 passages 8 and 10 and the bypass passage 18 are opened in the spherical valve seat member 9. The lower part of the valve chamber 4 communicates from the discharge passages 8 and 10 and the bypass passage 18 to the outlet 7 through the outlet passage 6. A hollow spherical float 11 serving as a valve member that opens and closes the discharge passages 8 and 10 by being seated on the valve chamber side end face of the spherical valve seat member 9 is disposed in the valve chamber 4 in a free state. The discharge passages 8 and 10 are opened on an axis passing through the ball center at the lowered position of the float 11 so that the float 11 is closed at the closed valve position. The bypass passage 18 is shifted from the position passing through the ball center at the lowered position of the float 11 so as to be normally opened even when the float 11 is lowered. The discharge passage 10 is used when the opening area is larger than that of the discharge passage 8 and the maximum operating pressure of the piping system is low, or when the foreign matter adheres and accumulates in the discharge passage 8 with the same opening area as the discharge passage 8. Or A float seat 12 with which the float 11 abuts at a position where the discharge passages 8 and 10 are closed is provided below the float 11.

  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 from the discharge passage 8 through the bypass passage 18 and the outlet passage 6 to the outlet 7, and when the discharge passage 8 is closed, leakage of gas in the valve chamber 4 is prevented. The

  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. Further, by rotating the valve shaft from the outside to rotate the spherical valve seat member 9, the valve chamber 4 is communicated to the outlet 7 side via the discharge passage 10 or the bypass passage 18 instead of the discharge passage 8.

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, 10 Discharge passage 9 Spherical valve seat member 11 Float 17 Cutlery member 18 Bypass passage

Claims (1)

A spherical valve seat member having a discharge passage and a bypass passage that form an inlet, a valve chamber, and an outlet in the valve casing and communicates the valve chamber to the outlet side is attached to the valve casing so as to be rotatable, and the spherical valve seat member is installed in the valve chamber. A valve member that opens and closes the discharge passage by separating and seating is disposed, and the valve shaft that rotates the spherical valve seat member from the outside and rotates the valve chamber to the position that communicates with the outlet side through the discharge passage or bypass passage is spherical valve seat A drain trap characterized in that a blade member is provided on the valve casing for rubbing 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. .

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