JPS6054556B2 - 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 using a downward bucket-float having an opening for introducing fluid from an inlet at the bottom and a small ventilation hole at the top.

Rather than operating a separate discharge valve body via a lever or link, a nearly spherical bucket float is housed freely inside the valve chamber, and a seal provided on its outer surface directly opens and closes the valve port. A bucket float type steam trap has been proposed.

In this case, the bucket float is accommodated in a free state in the valve chamber, and fluid such as steam or condensate introduced into the bucket float from the inlet collides with the inner spherical surface of the bucket float, causing the inner spherical surface to Depending on the position where the fluid collides, the bucket float receives a force in the floating or descending direction, making it impossible to maintain the bucket float at a predetermined lowering position, resulting in unstable operation. The present invention aims to solve the above-mentioned problem, and uses a substantially spherical downward bucket float with an opening for introducing inlet fluid into the interior at the bottom and a small ventilation hole at the top, and uses the outer spherical seal portion of the float to create a valve. In order to open and close the port directly, an inlet pipe is housed in a free state in the valve chamber and introduces the inlet fluid into the bucket float, and is extended through the introduction opening of the bucket float to the inside of the bucket float. The outflow holes are opened horizontally and symmetrically distributed above and below the horizontal plane passing through the spherical center of the bucket float in the lowered position.

Therefore, according to the present invention, when the bucket float tries to rise from a predetermined lowering position, the fluid flowing out from the inlet pipe hits the surface extending above the inner spherical surface and acts in the direction of lowering it. If the bucket float attempts to descend from the predetermined lowering position, it will come into contact with a surface extending below the inner spherical surface and act in a direction to float it, so the bucket float is held at the predetermined lowering position by the action of this fluid. ``This has an inlet pipe installed vertically,
This can be easily carried out by providing a plurality of outflow holes horizontally arranged at equal angles to allow the fluid to flow out from the introduction pipe.
Next, the illustrated embodiment will be described in detail.

A lid 3 is attached to a substantially bowl-shaped main body 1 with bolts 4 via a gasket 2, and a valve chamber 5 is formed inside. A substantially spherical packet float 10 having a spherical seal 19 on its outer surface is accommodated in the valve chamber 5 in a free state. This bucket float 10 has small ventilation holes 9 at the top.
It is formed by joining a hemispherical shell 10a with ing. The inlet 6 is provided on the side of the main body 1,
It extends from there through an inlet passage 7 to the bottom of the main body 1 and communicates with the valve chamber 5 through an introduction pipe 12 screwed onto the bottom wall of the main body 1 and extending from an introduction opening 8 into a bucket float 10. As shown in the figure, the inlet pipe 12 has outflow holes 14a equiangularly provided in four directions corresponding to a horizontal plane passing through the spherical center of the bucket float 10 at a predetermined lowering position, and outflow holes 14a that are vertically symmetrical across this horizontal plane. It has outflow holes 14b equiangularly provided in four directions on a plane. A valve seat member 16 is screwed onto the inner wall of the main body 1 from the inside via a gasket 15, and the valve chamber 5 communicates with an outlet 18 through a valve port 17 of the valve seat member 16. Reference numeral 20 indicates a ceiling float seat provided on the lid body 3 for determining the floating position of the bucket float 10, and reference numeral 21 indicates an introduction pipe 12 for determining the descending position of the bucket float 10.
A float pedestal installed at the upper end of the float pedestal 21.
The upper surface of the bucket float 10 is formed into a spherical shape having approximately the same radius of curvature as the inner surface of the float 10 so that the bucket float 10 can be held stably.

The operation of this embodiment will be explained.

The bucket float 10 rises and falls according to the amount of gas inside, and is connected to the inlet 6, the inlet passage 7, the inlet pipe 12, and the outlet hole 14.
Steam enters through a and 14b, and when the amount of gas in the float 10 increases, it floats up and flows directly through the seal portion 19 to the valve port 17.
is closed, and when condensate enters and the amount of gas in the float 10 decreases due to escaping from the small vent hole 9, etc., the valve port 17 descends.
When opened, the drainage action is performed automatically. In such an operation, the direction of the fluid flowing out from the outflow holes 14a and 14b changes depending on the position of the bucket float 10. The outflow force acting on the inner spherical surface of the lower hemisphere of the bucket float 10 increases, and a downward force acts on the bucket float 10, and when the bucket float 10 attempts to descend from the predetermined lowering position shown in the figure, the bucket float 10 The outflow force acting on the inner spherical surface of the upper hemisphere increases, and a force in the downward direction acts on the packet float 10, and the bucket float 10 is held at the predetermined downward position shown in the figure. Further, the outflow holes 14a, 14b are provided equiangularly in the horizontal direction.
The force of the fluid flowing out from b is canceled out as a whole, and the bucket float 10 is kept stable at the predetermined lowered position without wobbling. Furthermore, in this embodiment, the outflow hole 1
4a and 14b, but only the outflow hole 14a or 14b
The same effect can be achieved even if only ``is used''.

[Brief explanation of the drawing]

The figure is a longitudinal cross-sectional view of a bucket-to-float type steam trap according to one embodiment. 1 is the main body, 3 is the lid body, 5 is the valve chamber, 6 is the inlet, 8 is the introduction opening, 9 is the vent hole, 10 is the bucket float, 12 is the introduction pipe, 13 is the joining line, 14a, 14b is the outflow hole, 16
17 is a valve seat member, 17 is a valve port, 18 is an outlet, 21 is a ceiling float seat, and 22 is a float pedestal.

Claims (1)

[Claims] 1. An almost spherical downward bucket float with an opening at the bottom for introducing the inlet fluid into the interior and a small vent hole at the top.
The outer spherical seal directly opens and closes the valve port, and the inlet pipe is accommodated in the valve chamber in a free state and introduces the inlet fluid into the bucket float, and is extended to the inside of the bucket float through the introduction opening of the bucket float. , characterized in that a plurality of outflow holes are opened in the peripheral wall of the introduction pipe horizontally and symmetrically distributed above and below the horizontal plane passing through the spherical center of the bucket float in the lowering position. Bucket float type steam trap.