JPS6054557B2 - 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 which a valve hole is directly opened and closed by a downward-opening bucket float disposed freely within a valve chamber.

This type of trap has an inlet at the bottom of the valve chamber that introduces gas such as steam from the inlet side into the float, and an inlet pipe that extends from the bottom of the valve chamber through the downward opening of the float and into the float. Some floats introduce gas such as steam into the float. However, in the former case,
The gas flowing out from the inlet is dispersed and difficult to be introduced into the float, which delays the floating of the float and delays valve closing.The gas that is not introduced into the float becomes bubbles and rises around the float, causing the float to float. It had become a cause for turmoil. Further, in the latter type, when the float oscillates, it gets caught in the introduction pipe, and the float floats up and sinks, causing a problem with the opening/closing valve. The present invention aims to solve the above-mentioned inconvenience, and the technical means of the present invention taken for this purpose are as follows: (1) A downward-opening bucket float having a sealing surface formed on the outside is connected to the valve hole with the external sealing surface. (b) An inlet pipe communicating with the inlet is placed at the bottom of the valve chamber, and its upper end is extended into the interior through the downward opening of the bucket float; (c) When the bucket float swings around the valve seat at the bottom of the introduction pipe, the valve hole side corresponding to the downward opening edge of the bucket float in the seated position and the pipe wall on the opposite side are It is cut out across a width that does not touch the edge of the downward opening.

To explain the operation of the above technical means, when the valve is opened, the bucket float swings using a point at the bottom of the valve seat as a fulcrum, but the downward opening edge is located in the notch of the introduction pipe. As the notch is recessed, it is less likely to hit the wall of the introduction pipe, eliminating the risk of the bucket float getting caught on the introduction pipe.

On the other hand, even if there is a notch, the steam at the inlet will rise straight up the introduction pipe and reliably enter the inside of the bucket float, so it functions in the same way as a conventional bucket float steam trap. Therefore, even in a new bucket-and-float type steam trap in which a bucket-to-float freely accommodated in the valve chamber directly opens and closes the valve hole with a seal surface provided on the outside, the bucket-to-float is pulled into the introduction pipe. Works reliably without sticking.

The illustrated embodiment will be described.

A lid 3 is fixed to the main body 1 via an airtight gasket 2 with suitable tightening means such as bolts, forming a valve housing having a valve chamber 4 therein. The float 9 is approximately spherical and has a spherical shell part 12 whose lower part is cut out along one plane, and is joined to the cut part of the shell 12 to form a downward opening 13, and the center of gravity is shifted toward the downward opening 13 side. Seshime cutlet shell part 12
It consists of a cap 14 that prevents deformation of the valve 14, and is disposed in a free state within the valve chamber 4. 10 is a spherical sealing surface formed on the outside of the float 9, and 11 is a small vent hole. Entrance 5
The float 9 extends through the inflow passage 6 to the bottom of the valve chamber 4 and passes through the introduction hole 8 of the introduction pipe 7 screwed to the bottom of the valve chamber 4.
It communicates within. The introduction pipe 7 has two parts, one on the side facing the valve seat member 16 and the other on the opposite side, to prevent the edge of the downward opening 13 from getting caught when the float 9 swings when seated.
A cutout portion 15 is provided which is cut out substantially perpendicularly to the swinging direction (direction connecting the valve seat member 16 and the introduction pipe 7). The larger the passage area of the introduction hole 7, the more slowly the steam flows and does not leak out from the notch 15. The longer the length of the notch 15, the lower the risk that the edge of the downward opening 13 of the float 9 will get caught, but at the same time it will be easier for steam etc. to leak out. The opening 15 is provided with the minimum length so that the edge does not get caught. The valve seat member 16 is a gasket 1 for maintaining airtightness.
The valve hole 19 is screwed onto the upper part of the valve chamber through the valve hole 7 and forms a valve hole 19 that communicates the valve chamber 4 with the outflow passage I 18 . 20 is an outlet communicating with the outflow passage 19, and 21 is a float seat that holds the float 9 during floating.

The operation of the above embodiment will be explained. When gas such as steam is introduced into the refloat 9 from the inlet 5 through the inflow passage 6, it is guided into the float 9 by the introduction pipe 7, and the introduction hole 8 of the introduction pipe 7 has a large passage area so that the steam, etc. is cut off. Since the steam is arranged to flow slowly without leaking from the notch 15, the steam and the like are reliably introduced into the float 9, and the float 9 is not disturbed by bubbles of leaked steam or the like. Therefore, the float 9 floats up due to the buoyant force caused by the introduction of steam, etc., and seats the sealing surface 20 on the valve seat member 16 as shown in the figure, thereby sealing the valve hole 1.
Block 9. When condensate is introduced into the float 9 from the inlet 5 through the introduction passage 6, etc., the buoyancy of the float 9 decreases, and the float 9 swings about a point on the valve seat member 16 as a fulcrum, and then separates, as shown by the two-dot chain line in the figure. However, since the introduction pipe 7 is provided with a notch 15, the edge of the downward opening 13 will not get caught on the introduction pipe 7, and thus smooth opening and closing operations can be performed. .

[Brief explanation of the drawing]

The figure is a longitudinal sectional view of a bucket-to-float type steam trap according to an embodiment of the present invention. 1 is the main body, 3 is the lid, 4 is the valve chamber, 5 is the inlet, 6 is the inflow passage, 7 is the introduction pipe, 8 is the introduction hole, 9 is the downward opening bucket float, 10 is the sealing surface, 13 is the downward direction an opening, 15 a notch, 16 a valve seat member, 18 an outflow passage, 19 a valve hole,
20 is an exit.

Claims (1)

[Claims] 1. A downward-opening bucket float with a sealing surface formed on the outside is freely placed in the valve chamber so that the external sealing surface directly opens and closes the valve hole, and an inlet pipe communicating with the inlet is erected at the bottom of the valve chamber. Then, extend its upper end into the interior through the downward opening of the bucket float, and extend the lower end of the introduction pipe to the valve hole side and the opposite side at a position corresponding to the downward opening edge of the bucket float in the seated position. A bucket-to-float type steam trap in which the pipe wall is cut out to a width that prevents the downward opening edge from touching when the bucket-to-float swings around the valve seat.