JPS6054554B2 - Bucket float type steam trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bucket and float type steam trap,
In particular, the present invention relates to a steam trap having a downward bucket float that directly opens and closes a valve port with a spherical seal portion on an upper outer surface.

In this type of steam trap, the bucket float is accommodated in the valve chamber in a free state, and when the valve is closed, the bucket float is only adsorbed to the valve port by the action of fluid pressure, and the liquid level in the valve chamber is There was a problem in that when the bucket float became agitated, it moved away from the valve opening, causing the valve to open unnecessarily.

As a result, the liquid level in the valve chamber would drop and the bucket float would sink, leaving the valve open. The present invention aims to eliminate such inconveniences and provide a steam trap that can reliably close the valve and maintain the valve closed state even if the liquid level within the valve chamber fluctuates to some extent. The technical means of the present invention taken to achieve the above object is that a downward bucket float having a spherical seal formed on the outer surface of the upper part is placed freely inside the valve chamber, and is placed on the upper side of the valve chamber. In the case where the valve opening is directly opened and closed by the spherical seal part of the bucket float, the spherical seal part of the bucket float has an annular ring that abuts at a predetermined circumference at the floating valve position. A float seat is installed on the ceiling of the valve chamber.

The operation of the above means will be explained.

When floating, the bucket float will move as the liquid level fluctuates.
It floats to a position away from the valve closing position, but since the upper spherical seal part is inside the annular float seat formed on the ceiling of the valve chamber, the entire circumference of the spherical seal part eventually becomes annular. comes into contact with the float seat. At this time, a portion of the spherical seal portion contacts the valve seat and closes the valve port. Even if the liquid level in the valve chamber fluctuates in this valve-closed position, the bucket float will rotate slightly because its spherical seal is in contact with the float seat at a predetermined circumference, but it will not move horizontally. There is no deviation, and the valve remains closed with a portion of the seal remaining in contact with the valve seat.

Therefore, in the bucket-to-float type steam trap according to the present invention, when fluid flows into the valve chamber or when vibrations in the piping are transmitted to the steam trap,
Even if the liquid level in the valve chamber fluctuates, the bucket float reliably seats or remains seated, so no steam leaks.

Next, the illustrated embodiment will be described in detail.

A hemispherical shell-shaped lid 3 is attached to a bottomed cylindrical body 1 with bolts 4 via an airtight gasket 2. An inlet 5 provided in the bottom wall of the main body 1 communicates with a valve chamber 7 through an inlet pipe 6 extending coaxially therefrom. Valve chamber 7
A downward bucket float 8 is accommodated in a free state. The float 8 is made by joining a cylindrical part 10 to a hemispherical shell part 9, and the lower end edge 11 is rounded so as not to catch on the inner circumferential wall of the valve chamber 7. Thus, the upper outer surface of the bucket float 8, ie, the outer surface of the hemispherical shell portion 9, forms a spherical seal portion 12. A valve seat member 14 is screwed onto the lid 3 via a gasket 13 for airtightness, and the valve chamber 7 is connected to the valve port 1.
5 and to an outlet 17 through a throttle orifice 16 smaller than the valve opening 15. The valve port 15 opens at an angle of approximately 20 degrees, and the valve seat surface 18, which forms the end surface of the valve chamber 7 side of the valve seat member 14, is finished in a spherical shape, so that the spherical seal portion 12 of the float 8 can be smoothly sealed. Sliding contact. 19 is an air vent.

The bucket float 8 floats up and down according to the amount of gas inside, and when steam enters from the inlet 5 and the amount of steam inside the float 8 increases, it floats up and directly closes the valve port 15 with the seal part 12 and closes the inlet 5. When condensate comes in and the amount of steam in the float 8 decreases as it escapes from the vent 19, it sinks and the valve port 15 is opened to automatically drain the water. In such an operation, as shown in detail in Figs. 2 and 3, the lid 3
An annular float seat 20 is provided on the ceiling of the valve chamber 7 inside the valve chamber 7 to guide the seal portion 12 of the bucket float 8 to the valve-closed position and hold it there while allowing free rotation. . Therefore, even if the liquid level in the valve chamber 7 fluctuates somewhat, the floating bucket float 8 will be reliably guided to the valve closing position with its spherical seal portion 12 hitting the float seat 20 circumferentially. At the valve closing position at the highest level of floating, the seal portion 12 reliably closes the valve port 15 by simply rotating slightly due to fluctuations in the liquid level.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a bucket-to-float type steam trap according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of only the lid body.
FIG. 3 is a bottom view of the lid. 1 is the main body, 3 is the lid, 5 is the inlet, 7 is the valve chamber, 8 is the bucket float, 12 is the spherical seal portion, 15 is the valve port, 17
is an exit, and 20 is a float seat.

Claims (1)

[Claims] 1. A downward bucket float with a spherical seal formed on the outer surface of the upper part is freely placed in the valve chamber, and the valve port placed on the side of the upper part of the valve chamber is opened and closed directly by the spherical seal of the bucket float. A bucket-to-float steam trap is provided with an annular float seat on the ceiling of the valve chamber, with which the spherical seal portion of the bucket-to-float abuts at a predetermined circumference at the floating valve closing position.