JPS6238597B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam trap using a downward bucket float, and in particular, the bucket float is arranged in a free state in a valve chamber, and a sealing surface is formed on the outer surface of the upper part of the steam trap. 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 chamber.

In this type of trap, the bucket float is placed freely inside the valve chamber, so the bucket float swings and gets caught on the valve chamber wall, etc., making the opening/closing valve unstable and preventing steam leakage. There are problems that arise. Also, when the bucket float separates from the valve seat and opens the valve, it sinks while rotating using the lower part of the valve seat as a fulcrum, but if condensate continuously flows in small amounts, the bucket float will sink. The valve was not far enough away from the valve opening, and condensate was being discharged in a half-open state, which was undesirable as it was mistaken for a steam leak.

The present invention aims to solve such inconveniences by forming an inlet, a valve chamber, and an outlet with a valve casing,
A valve seat with an open valve port communicating between the valve chamber and the outlet is arranged to protrude from the upper side of the valve chamber, and a downward bucket float with an introduction opening at the bottom for introducing the inlet fluid into the valve chamber is installed. In order to directly open and close the valve port on the outer surface of the upper part, a guide rod is suspended from the top wall of the valve chamber to the bottom wall of the valve chamber, and the inlet fluid is bucketed or floated onto the guide rod. The bucket float is formed with a spherical shell of more than a hemisphere, and a through hole with a diameter slightly larger than the guide rod is made in the upper part of the spherical shell of the bucket float, and the guide rod is fitted into the bucket float. The guide rod was made to contact only the through hole of the bucket float, and the part of the guide rod facing the through hole of the bucket float between the highest floating position and the lowest position of the bucket float was removed. It is characterized by:

The action is as follows.

Since the bucket float is fitted to a guide rod, it rises and falls guided by the guide rod, swings, and opens and closes the valve reliably without getting caught on the valve chamber wall, etc., and causing steam leakage. can. In addition, when the bucket float rotates and descends using the lower part of the valve seat as a fulcrum, the guide rod has a cutout, so the through hole of the bucket float does not get caught on the guide rod. . At this time, the steam in the bucket float flows out from between the through hole and the defective part, so the bucket float quickly descends and fully opens the valve opening, and the valve opens and closes crisply, making it easy to mistake it for a leak. Never.

The illustrated embodiment will be described. In FIG. 1, a lid 3 is fixed to the main body 1 via a gasket 2 for airtightness with appropriate tightening means (not shown) such as a bolt or nut, forming a valve chamber 4. .
The inlet 5 extends through an inflow passage 6 to the bottom of the valve chamber 4, and enters the valve chamber through an introduction hole 7 and an opening 8 of a guide rod 9, which is vertically screwed onto the bottom wall of the valve chamber 4 and whose upper end is supported by a lid 3. It connects to 4. The valve seat member 10 is screwed onto the upper inner wall of the valve chamber 4 via an airtight gasket 11, and forms a valve port 13 that communicates the valve chamber 4 with the outlet 12. A downward bucket float 14 freely disposed in the valve chamber 4 has a substantially spherical shape, and a guide rod 9 passes through it through an introduction opening 15 at the lower part and a through hole 16 at the upper part. 17 is float 1
4 is a spherical sealing surface provided on the outside, and 18 is a weight fixed to a portion forming the introduction opening 15. The guide rod 9 is inserted into the through hole 16 of the float 14 in preparation for rocking when the float 14 is seated (floated).
Defect part 1 of an appropriate shape so that the edge of the
9 is formed, and is further formed in an appropriate size so as to narrow the through hole 16 of the float 14 when the float 14 sinks. The float floating seat 20 is formed on the inner surface of the lid 3, and when the float 14 is seated, the through hole 16
It is formed into a flat shape so as to close the area and hold it stably. In addition, in order to vent the steam in this floating float 14 to the upper part of the valve chamber 4, a guide rod 9 and a lid 3 are used.
An air escape passage consisting of a through hole 21, an end opening 22, and a through hole 23 is formed in the. The float sinking seat is formed by a plurality of ribs 24 protruding from the bottom wall of the valve chamber 4.

Explain the operation. Steam flows from the inlet 5 to the inlet 6,
When introduced into the float 14 through the introduction hole 7 and the opening 8, the float 14 is in a depressed state (indicated by the two-dot chain line A) because the through hole 16 is constricted.
The valve seat member 1 floats up due to the buoyancy caused by the introduction of steam.
0 and close the valve port 13. At this time, float 1
4 is guided by the guide rod 9 and quickly floats up without getting caught in the valve chamber 4, etc., and can close the valve port 13, thereby preventing steam leakage. Furthermore, in this floating state, the through hole 16 of the float 14 comes into contact with the float flotation seat 20, so that it is stably held, and the escape air from inside the float 14 to the upper part of the valve chamber 4 is also passed through the escape passages 21, 22, 23 and from a location other than float 14, so when air is released, float 1
4 will not be shaken carelessly. When condensate is introduced into the float 14 from the inlet 5, the float 14 loses its buoyancy and sinks. At this time, float 1
4 swings using the end of the valve seat member 10 as a swing fulcrum as shown by the two-dot chain line B in the figure, but since the guide rod 9 is provided with a cutout 19, the through hole 1
6 edges do not get caught, and further, the steam inside the float 14 flows out from between the through hole 16 and the defective part 19, and the float 14 quickly sinks, leaving the valve seat member and opening the valve port 13. open. The sunken float 14 rests on the rib 24 and is held stably because this portion is substantially horizontal and flat.

Therefore, the float 14 is guided by the guide rod 9 and displaced between predetermined floating and sinking positions, and is stably held at the floating and sinking positions without getting caught, so that steam leakage does not occur and the float can be moved quickly. Enables reliable opening/closing of valves.

FIG. 2 shows another embodiment. However, equivalent parts common to the embodiment of FIG. 1 are given the same reference numerals and explanations are omitted. The missing portion 19' of the guide rod 9 is provided only on the side facing the valve seat member 10, and
During the floating of the float 14, the amount of air lost between the through hole 16 and the guide rod 9 is reduced, so that the floating operation of the float 14 is performed quickly and reliably.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a bucket-to-float type steam trap according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of another embodiment. 1 is the main body, 3 is the lid, 4 is the valve chamber, 5 is the inlet, 9 is the guide rod, 10 is the valve seat member, 12 is the outlet, 13 is the valve port, 14 is the float, 15 is the introduction opening, 16 is the through hole , 17 is the sealing surface, 19 and 19' are the missing parts,
20 is a float floating seat, 21, 22, and 23 are vent passages, and 24 is a rib forming a float sinking seat.

Claims (1)

[Claims] 1 Form the inlet, valve chamber, and outlet with the valve casing,
A valve seat with an open valve port communicating between the valve chamber and the outlet is arranged to protrude from the upper side of the valve chamber, and a downward bucket float with an introduction opening at the bottom for introducing the inlet fluid into the valve chamber is installed. In order to directly open and close the valve port on the outer surface of the upper part, a guide rod is suspended from the top wall of the valve chamber to the bottom wall of the valve chamber, and the inlet fluid is bucketed or floated onto the guide rod. The bucket float is formed with a spherical shell of more than a hemisphere, and a through hole with a diameter slightly larger than the guide rod is made in the upper part of the spherical shell of the bucket float, and the guide rod is fitted into the bucket float. , the guide rod was made to contact only the through hole of the bucket float, and the part of the guide rod facing the through hole of the bucket float between the highest floating position and the lowest position of the bucket float was removed. Features a bucket-to-float steam trap.