JPH0229360Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a steam trap using a downward-opening bucket float, and in particular, the upper part is made of a spherical shell and a valve seat is brought into contact with the outer surface of the steam trap to open and close the valve opening. The bucket float is housed in a free state in the valve chamber, and the spherical seal portion on the outer surface of the upper part is
This invention relates to a bucket-and-float type steam trap in which the valve opening is opened and closed by directly abutting against a valve seat that is arranged to protrude from the upper side of a valve chamber.

The bucket float of conventional bucket float type steam traps is connected to the valve casing by mechanical means such as levers and links.
Mechanically guided displacement.

However, since the bucket float of the trap according to the present invention is housed in a free state within the valve chamber, its displacement is determined by buoyancy and the flow of fluid within the valve chamber. That is, this bucket float rises and falls depending on the amount of steam introduced into the interior, that is, the magnitude of buoyancy, and on the way, it is influenced by the flow of fluid in the valve chamber toward the valve port.

To explain in detail, the bucket float does not float vertically upward, but floats approximately diagonally upward while being pulled laterally toward the valve port by the flow of fluid. As a result, when the valve port is closed, the bucket float is in a state where the lower part with the opening is tilted away from the valve port, or to put it another way, the lower part is swung out to the opposite side of the valve port. This condition is not only unstable, but also causes internal steam to overflow, and the resulting vibrations cause the bucket float to separate from the valve seat, causing steam to leak.

The present invention aims to solve this inconvenience by arranging a valve seat with an open valve opening protruding from the upper side of the valve chamber, and making the upper part a spherical shell so that its outer surface is in contact with the valve seat. A downward-opening bucket float with a sealing part that opens and closes the valve opening is housed in the valve chamber in a free state, and an introduction pipe is erected at the bottom of the valve chamber so that the upper end enters the interior through the lower opening of the bucket float. The introduction pipe is arranged so as to be deviated from the center of the bucket float when it is floating and sitting on the valve port side.

The action is as follows. The bucket float is attracted to the valve opening and floats up while tilting. At this time,
The inside of the lower opening of the bucket float hits the introduction pipe which is deviated towards the valve port side, the inclination is suppressed and the float floats up, so the valve closes in the desired seating state, resulting in complete occlusion.

In this manner, the present invention utilizes the sliding contact between the introduction pipe and the lower opening of the bucket float in order to guide the bucket float to a desired seating position. At this time, the introduction tube, which was conventionally necessary, is used and the position is simply shifted, so no extra cost is incurred.

Next, the illustrated embodiment will be described in detail. Bottom member 1
is substantially plate-shaped, and an inlet 2 is formed on the right side in the drawing, that is, on the side of the valve opening described below, and a lid member 4 is attached with bolts 5 via a gasket 3 for airtightness. The inlet 2 communicates with the valve chamber 7 through the introduction pipe 6, which is located biased toward the valve port side like the inlet 2. 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 airtightness, 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 is the valve port 10
It forms a spherical seal portion 15 that opens and closes. 16 is a ventilation hole. The bucket float 8 swings around the valve seat that forms the valve port 10 to open and close the valve port 10, but the bucket float 8 that has floated up is pulled toward the valve port 10 before it is seated. ,
The valve port 10 is closed by tilting as shown by a two-dot chain line 17. At this time, the lower end of the bucket float 8 hits the introduction pipe 6 and its inclination is restricted. This is also achieved by the inner wall 18 of the valve chamber 7 on the left side in the drawing. Therefore, the bucket float 8 reliably closes the valve port 10 and performs smooth opening and closing operations.

[Brief explanation of the drawing]

The figure is a vertical cross-sectional view of a bucket and float type steam trap according to an embodiment of the present invention. 1: Bottom member, 2: Inlet, 4: Lid member, 6: Inlet pipe, 7: Valve chamber, 8: Downward bucket float, 1
0: Valve port, 11: Outlet, 15: Spherical seal part,
16: Ventilation hole.

Claims (1)

[Scope of utility model registration request] A downward-opening bucket in which a valve seat with an open valve port is arranged to protrude to the upper side of the valve chamber, the upper part is made of a spherical shell, and the outer surface of the valve seat is used as a seal to open and close the valve port by contacting the valve seat. Place the bucket float in a free state in the valve chamber, and erect the introduction pipe at the bottom of the valve chamber so that the upper end enters the interior through the lower opening of the bucket float.
A bucket-to-float type steam trap characterized in that the introduction pipe is arranged to be deviated toward the valve port side from the center of the bucket-to-float when it is floating and sitting.