JPS6054559B2 - Downward opening bucket float type steam trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam trap with a downwardly opening bucket float.

A steam trap has been proposed that includes a downwardly opening bucket float housed in a valve chamber in a free state so as to directly open and close the valve port with a sealing surface provided on the outer surface.

The float opens the valve opening while rotating around the one point on the valve seat that it comes into contact with, but the larger the opening of the valve opening, the more it is released from the suction force of the discharge flow from the valve opening, and the more the float opens the valve. As the valve advances, it gains momentum and shakes, and eventually collides with the rigid wall of the valve casing and receives a large reaction force, causing it to lose its posture and get caught on the valve casing wall and the inlet pipe, causing the valve to open incompletely. There was a problem where the valve could become incompletely closed. The present invention aims to solve these inconveniences, and aims to provide a downward-opening bucket-float type steam trap in which the float operates stably and reliably and does not fall into an incompletely closed state. It is. The technical means of the present invention taken to achieve the above object is a downwardly opening bucket float housed in a free state in a valve chamber so as to directly open and close a valve port with a sealing surface provided on the outer surface. A)
Set up an introduction pipe communicating with the inlet at the bottom of the valve chamber, extend its upper end into the interior through the lower opening of the bucket float, and make at least a horizontal hole facing the direction of the valve opening. It is provided with a tapered wall member that tapers upward from the opening.

The above technical means works as follows.

That is, the inlet fluid passes through the introduction pipe and is ejected horizontally inside the bucket float from a horizontal hole at the upper end of the introduction pipe located inside the bucket float. Therefore, the bucket float, which was sitting on the valve seat and blocking the valve port,
When opening the valve, the more the valve opening is opened by rotating around a point at the bottom of the valve seat, the closer the tapered wall member provided on the bucket float gets to the horizontal hole at the upper end of the introduction pipe. It is subjected to increasingly strong pushing back force by the jet flow from the side hole.

Therefore, the valve opening movement of the bucket float is damped and silently performed, and the valve does not lose its posture, so it does not get caught on the valve housing wall or the introduction pipe.

Therefore, the valve will not fall into an incompletely closed state the next time the valve is closed. The present invention produces the following unique effects.

That is, when the bucket float floats, the tapered wall member receives at least the ejected flow from the side hole facing the direction of the valve port, so the bucket float does not float with the valve port side tilted downward. There is no possibility that the bucket float will come into contact with the valve seat near the ceiling and sit in an inclined position. In addition, if the horizontal holes are made uniformly around the entire circumference of the upper end of the introduction tube, no matter which direction the bucket float is tilted or eccentric in any direction, it will receive a force pushing back from the jet flow, so the introduction tube It is held in a non-tilted position with the lower opening facing downward, concentrically around the

Next, a detailed explanation will be given based on the illustrated embodiment.

A valve chamber 4 is formed by attaching a lid 3 to the main body 1 with bolts (not shown) via an airtight gasket 2. Main body 1
An inlet 5 provided in the side wall of the valve chamber 4 extends through an inflow passage to the lower part of the valve chamber 4, and is connected to a vertical hole 8 of an inlet pipe 7 screwed vertically to the bottom wall of the valve chamber 4 and horizontal holes 9'', 9 at the upper end. It communicates with the valve chamber 4 through ''. Inside the valve chamber 4 are a metal ball shell piece 10 and a cap 1.
A downwardly open bucket float 12 consisting of 1 is arranged in a free state. The outer surface of the float 12 forms a spherical sealing surface 13, which can be seated on a valve seat protruding from the upper part of the valve chamber 4 to close the valve port 14. The valve port 14 is formed in a valve seat member 16 screwed onto the lid 3 via an airtight gasket 15, and communicates with an outlet 18 through an outflow passage 17. The inlet 5 and outlet 18 are provided with piping threads,
and are located on the same horizontal axis. Base 11
forms an opening, ie, a lower opening 19, into the float 12 through which gas such as steam from the inlet 5 is introduced. The cap 11 has sufficient weight so that the entire center of gravity of the float 12 is eccentric to the cap 11 side with respect to the ball center, and the lower opening 19 always faces downward. An air vent 20 is provided at the top of the float 12, that is, on the opposite side of the base 11. An inlet flow is created inside the float 12. A wall member 21 is arranged. The working wall member 21 has a thin tapered tubular shape, and one end is integrally formed continuously from the base 11, and the other end is open. A communication port 22 is provided at the connection between the cap 11 and the working wall member 21 to ensure free flow of condensate. The inner lower corner of the cap 11 is rounded to prevent it from getting caught on the introduction tube 7. The horizontal hole 9 of the introduction pipe 7 opens on the vertical plane through which the axis of the valve port 14 passes, on the valve port 14 side and the opposite side thereof. Next, the operation will be explained.

When the valve chamber 4 is filled with condensate and steam is introduced from the inlet 5 through the passage 6 and the vertical hole 8 into the float 12 from the horizontal hole 9, and there is sufficient steam in the float 12, the illustrated As shown, the float 12 floats up, the sealing surface 13 comes into contact with the valve seat, and the valve port 14 is closed.Next, when condensate flows in from the inlet 5, the steam in the float 12 is replenished. is cut off, and the float 12 rotates around a point A on the valve seat from the position 1 shown by the solid line to the position ■ shown by the thin line.
2 rotates, the opening degree of the valve port 14 becomes larger, and at the same time, the working wall member 21 approaches the side hole 9'' that much, the injection from the side hole 9'' becomes stronger, and thus the valve opening direction of the float 12 The movement of the horizontal hole 9'' is fluidly buffered and absorbed by the jet flow from the horizontal hole 9'', and becomes quiet.
'' hits the wall surface on the valve port side of the member 21 and applies a rotational force in the valve opening direction to the float 12. When the float 12 rotates by a predetermined amount or more, it separates from the valve seat and sinks. When steam flows in from 5, the steam is ejected from both horizontal holes 9'' and 9'', keeping the float 12 equidistant around the inlet pipe 7, and the float 12 gains levitation and rises as shown by the solid line. It seats on the valve seat at position 1 and closes the valve port 14. At this time, if the float 12 tries to tilt as shown in the thin line position 1, the jet from the horizontal holes 9'' and 9'' It acts on the wall surface of the member 21 to try to return the float 12 to position 1 shown by the solid line.

[Brief explanation of drawings]

FIG. 1 is a bucket and float type steam trap according to an embodiment of the present invention, and FIG. 2 is a front view of the working wall member of FIG. 1. 1 is the main body, 3 is the lid, 4 is the valve chamber, 5 is the inlet, 7 is the introduction pipe,
8 is a vertical hole, 9'' and 9'' are horizontal holes, 12 is a downwardly opening bucket float, 14 is a valve port, 16 is a valve seat member, 18 is an outlet,
19 is a lower opening, 20 is an air vent, 21 is a working wall member, 2
2 is a communication port.

Claims (1)

[Claims] 1.In those equipped with a downwardly opening bucket float housed freely in the valve chamber so as to directly open and close the valve port with a sealing surface provided on the outer surface, there is an inlet pipe connected to the inlet at the bottom of the valve chamber. , the upper end of which extends into the interior through the lower opening of the bucket float, has a horizontal hole facing at least the valve port, and has a tapered wall that tapers upward from the lower opening of the bucket float. A downward-opening bucket float type steam trap equipped with parts.