JPS6056957B2 - Bucket float steam trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam trap using a downward-opening bucket float, and in particular, the bucket float is housed in a valve chamber in a free state, and a seal is formed on the outer surface of the upper part of the steam trap. This invention relates to a bucket-to-float type steam trap in which the valve opening is opened and closed by coming into direct contact with a valve seat that is arranged to protrude from the upper side of a chamber.

The bucket float of a conventional bucket float type steam trap is connected to the valve casing by a mechanical means such as a lever or a link, so that it is mechanically guided and displaced.

However, since the bucket float of the trap according to the invention is housed in a free state within the valve chamber, its displacement is determined by the buoyancy and the flow of fluid within the valve chamber. In other words, the amount of steam introduced into the bucket float is
That is, the valve floats up and down depending on the magnitude of buoyancy, and on the way, it is influenced by the flow of fluid in the valve chamber toward the valve port. Therefore, if it floats away from the valve port, it will not be affected by the flow of fluid and will be attracted to the valve port, making it impossible or incomplete to close the valve port, or preventing smooth opening and closing of the valve. I can't do it.

The present invention aims to eliminate such inconveniences, and is characterized by providing wall surfaces on both sides of the bucket float, which are perpendicular to and perpendicular to the valve seat surface surrounding the valve port.

This wall can also be formed by the wall of the valve casing forming the valve chamber. The bucket float of the present invention originally swings freely along a vertical plane (swinging plane) that is perpendicular to the valve seat surface surrounding the valve port. Even if it deviates from this swing plane to the left or right, according to the present invention, it will hit the wall surfaces on both sides and will not deviate significantly. Therefore, when floating, the bucket float is influenced by the flow of fluid and reliably seats on the valve seat and closes the valve port. Next, the illustrated embodiment will be described in detail. The bottom member 1 has a substantially oval plate shape and has an entrance 2 at the central protrusion.
is formed, and a lid member 4 is attached with bolts 5 via a gasket 3 for airtightness. Inlet 2 communicates with valve chamber 7 through inlet pipe 6 . A downward bucket float 8 is arranged in a free state around the introduction pipe 6. The bucket float 8 has a bell shape with a cylindrical periphery of a hemispherical shell. The valve chamber 7 communicates with an outlet 11 through a valve port 10 formed by a valve seat member 9 . 12 is an O-ring gasket for airtight maintenance, 13 is a plug for attaching the valve seat member 9 to a predetermined position, and 14 is a gasket.

The upper outer surface of the bucket float 8 forms a spherical knob portion 15 that opens and closes the valve port 10. 16 is a ventilation hole.

Since the bucket float 8 opens and closes the valve port 10 by swinging about the valve seat forming the valve port 10, it is desirable to allow the bucket float 8 to freely swing along the plane of the drawing in FIG. However, if the bucket float 8 swings in a direction perpendicular to the plane of FIG. As can be seen in FIG. 2, the wall forming the valve chamber 7 has a portion 17 for guiding the bucket float 8 in a predetermined oscillating direction. Incidentally, the bucket float 8 can take an inclined position as shown by a two-dot chain line 19.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a bucket-to-float type steam trap according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. 1 is a bottom member, 2 is an inlet, 4 is a lid member, 6 is an introduction pipe, 7 is a valve chamber, 8 is a bucket float, 10 is a valve opening, 11 is an outlet, 15 is a relief surface-shaped seal portion, and 16 is a passage. The air hole 17 is a wall portion that guides the bucket float in a predetermined swinging direction.

Claims (1)

[Claims] 1. A valve chamber is formed by a valve casing, a valve seat with an open valve opening is arranged to protrude to the upper side of the valve chamber, and a seal portion for opening and closing the valve opening is provided on the outer surface of the upper part. A downward-opening bucket float is housed in a valve chamber in a free state, and wall surfaces perpendicular to and perpendicular to a valve seat surface surrounding a valve port are provided on both sides of the bucket float. Float steam trap. 2. The bucket-to-float type according to claim 1, characterized in that a wall surface perpendicular to and in a vertical direction to the valve seat surface surrounding the valve port is formed by a wall of a valve casing forming a valve chamber. steam trap.