JP2014029184A - Float type drain trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a float type drain trap capable of preventing separation of a seating member for a valve member from a valve casing.SOLUTION: A valve casing is composed of a body 1 and a cover 2. An inlet 5, a valve chest 4, and an outlet 7 are formed on the valve casing. A valve seat member 9 is mounted at a lower portion of the valve chest 4 while welded to the cover 2. A discharge passage 8 for communicating the valve chest 4 to an outlet 7 side, is formed on the valve seat member 9. A float 11 seating on and separating from the valve seat member 9 to open and close the discharge passage 8, is disposed in the valve chest 4. A plug 13 is welded and mounted on the cover 2 coaxially with the valve seat member 9. An operating member 14 penetrating through the plug 13 so as to place its tip side in the discharge passage 8, is screw-connected to the plug 13 so that it can be operated to be advanced and retracted by screw from the external. The operating member 14 is provided with a valve member 17 seating on a rear end portion 9b of the valve seat member 9 to close the discharge passage 8 when the operating member 14 is advanced most.

Description

The present invention relates to a float-type drain trap that automatically discharges steam, compressed air, and drain generated in a gas piping system by floating up and down of the float, and in particular, removes foreign matter in a fluid adhering to a valve seat member on which the float is seated. It relates to things that can be cleaned.

A conventional float drain trap is disclosed in Patent Document 1, for example. The valve casing forms an inlet, a valve chamber, and an outlet, and a valve seat member is screwed to the valve casing and attached to the lower portion of the valve chamber to form a discharge passage that communicates the valve chamber with the outlet side. A float that opens and closes the discharge passage by being seated on and off the valve seat member is disposed in the valve chamber, and a plug is attached to the valve casing by screw connection to the valve casing on the same axis as the valve seat member. An operating member with the distal end located in the discharge passage is screwed to the plug and attached so that the screw can be advanced and retracted from the outside. When the operating member is moved forward most in the middle of the operating member, it is seated on the valve seat member. And a valve member for closing the discharge passage.

JP 2007-107643 A

The above-mentioned conventional float drain trap is configured such that when the operating member is moved forward most, the valve member of the operating member is seated on the valve seat member, whereby the inner surface of the discharge passage of the valve seat member and the end surface on the valve chamber side of the valve seat member However, there is a problem that the valve seat member is detached from the valve casing due to the looseness of the screw connection with the valve casing of the valve seat member due to repeated seating of the valve member on the valve seat member. .

Therefore, the problem to be solved by the present invention is to provide a float type drain trap that can prevent a member on which a valve member is seated from coming off the valve casing.

In order to solve the above problems, the float drain trap of the present invention has an inlet, a valve chamber, and an outlet formed in a valve casing, and a valve seat member is welded to the valve casing and attached to a lower portion of the valve chamber. A discharge passage that connects the valve chamber to the outlet side is formed in the member, a float that opens and closes the valve seat member to open and close the discharge passage is disposed in the valve chamber, and a plug is mounted on the valve casing on the same axis as the valve seat member. Attaching and attaching an operating member that penetrates the plug and the tip side is located in the discharge passage is screwed to the plug so that the screw can be advanced and retracted from the outside. When the operating member is moved forward to the operating member, the valve seat A valve member that is seated on the member and closes the discharge passage is provided.

According to the present invention, the valve seat member, which is the member on which the valve member is seated, is welded to the valve casing, so that even if the valve member is repeatedly seated on the valve seat member, the valve seat member is removed from the valve casing. This produces an excellent effect that it can be prevented.

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

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 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 attached to the lid 2 at the bottom of the valve chamber 4 by welding. 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 part of the valve chamber 4 communicates with the outlet 7 from the discharge passage 8 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 attached to the lid 2 by welding on the same axis as the valve seat member 9. The operating member 14 is screwed to the plug 13 so as to be adjustable from the outside. The operating member 14 passes through the plug 13, and the tip end portion 14 a located downstream of the tip end portion 8 a of the discharge passage 8 projects into the valve chamber 4 by advance, and the rear end portion is located outside. A packing 15 is disposed between the plug 13 and the operation member 14, and a packing retainer 16 is screwed to the plug 13 to keep the plug 13 and the operation member 14 airtight. The outer diameter of the distal end portion 14a of the operation member 14 is formed to be slightly smaller than the inner diameter of the distal end portion 8a of the discharge passage 8. When the operation member 14 is advanced, the distal end portion 14a of the operation member 14 causes the discharge passage 8 to Clean the inner surface of the tip 8a. A flange-shaped valve member 17 is integrally formed at the intermediate portion of the operation member 14. The valve member 17 of the operation member 14 is separated from and seated on the rear end portion 9b of the valve seat member 9, and is opened when the discharge passage 8 is closed and retracted when the discharge passage 8 is most advanced.

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 foreign matter adhering to the inner surface of the front end 8a of the discharge passage 8 of the valve seat member 9 and the end surface 9a on the valve chamber side, the operating member 14 is screwed so that the valve member 17 of the operating member 14 is the rear end of the valve seat member 9. It is seated on 9b and advanced to a position where the discharge passage 8 is closed. Accordingly, the inner surface of the distal end portion 8a of the discharge passage 8 of the valve seat member 9 is cleaned by the distal end portion 14a of the operation member 14. Then, after raising the liquid level in the valve chamber 4, the operation member 14 is retracted to open the discharge passage 8, and the distal end portion 14 a of the operation member 14 is positioned downstream of the distal end portion 8 a of the discharge passage 8. The drain in the valve chamber 4 is discharged to the outlet 7 at once while cleaning the foreign matter adhering to the valve chamber side end surface 9 a of the valve seat member 9.

INDUSTRIAL APPLICABILITY The present invention can be used for a float drain trap that automatically discharges steam, compressed air, or drain generated in a gas piping system.

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 4 Valve chamber 5 Inlet 6, 10 Outlet passage 7 Outlet 8 Outlet passage 8a Discharge passage front end 9 Valve seat member 9a Valve seat side end surface 9b of valve seat member Rear end portion 11 of valve seat member Float 13 Plug 14 Operation member 14a End portion 17 of operation member Valve member

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet. A valve seat member is welded to the valve casing and attached to the valve casing, and a discharge passage that communicates the valve chamber with the outlet side is formed in the valve seat member. A float that opens and closes the discharge passage by being seated on the valve seat member is attached to the valve seat, and a plug is attached to the valve casing on the same axis as the valve seat member, and the distal end side is disposed in the discharge passage through the plug. A screw member is attached to the plug and attached so that the screw can be advanced and retracted from the outside, and a valve member that is seated on the valve seat member and closes the discharge passage when the operating member is moved forward most to the operating member is provided. Float type drain trap.

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