JPS6128876B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bucket-and-float type steam trap in which a valve opening is directly opened and closed by the external sealing surface of a downward-facing bucket float placed freely within a valve chamber.

In this type of trap, the float is placed in a free state inside the valve chamber, so it easily oscillates and gets caught on the wall of the valve chamber, etc., and cannot reach the normal floating position, causing leakage while it gets caught. The float is agitated by the flow of steam, making it even more impossible to close the valve, resulting in an increase in steam leakage.

The present invention aims to eliminate such inconveniences by providing a guide tube to the float, which penetrates the top wall of the downward bucket float freely disposed within the valve chamber and hangs down to the lower fluid region within the float. attachment,
A guide rod hanging from the ceiling wall of the valve chamber is fitted into the guide tube of the float to guide the float, and the valve opening is opened and closed directly by the external sealing surface of the float. . Therefore, according to the present invention, the float is guided by the guide rod fitted into the guide tube, and does not get caught on the inner wall of the valve chamber or the like and cause steam leakage. Enables reliable opening and closing of valves.

The illustrated embodiment will be described. A lid 3 is attached to the main body 1 via a gasket 2 for airtightness, and a bolt 4 is attached to the main body 1.
, and a valve chamber 5 is formed. The inlet 6 extends through an inlet passage 7 to the bottom wall of the valve chamber 5 and communicates with the valve chamber 5 through an inlet hole 8 . A baffle plate 10 is screwed to the opening of the inflow hole 8 in the bottom wall of the valve chamber 5 via a threaded portion 9 to restrict the fluid flowing out from the inflow hole 8 from directly flowing into the guide cylinder. Reference numeral 11 denotes a rib provided on the bottom wall of the valve chamber 5, on which the float rests when it sinks as described below, and also forms a passage for fluid flowing out from the inlet hole 8. The valve seat member 12 is screwed onto the inner wall of the valve chamber 5 via an airtight gasket 13 to form a valve port 15 that communicates the valve chamber 5 with the outlet 14 . The downward bucket float 16 is approximately spherical,
The lower part has an introduction opening 18 for introducing the fluid from the inflow hole 8, and the upper part has a small vent hole 17.
It is housed in the valve chamber 5 in a free state. A guide tube 19 is attached to the top of the float 16, and the guide tube 19 has a guide hole 2 that passes through the top of the float 16 and hangs down vertically to a lower liquid area within the float 16.
0 is formed. The lower end of the guide tube 19 has a weight that eccentrically centers the center of gravity of the float 16 downward, and an inlet 8.
A throttle ring 22 is attached that also serves as a throttle to prevent fluid, particularly steam, flowing in from the valve chamber 5 from passing through the guide hole 20 and reaching the upper part of the valve chamber 5 . Reference numeral 21 denotes a spherical seal portion provided on the outside of the float 16.
The guide rod 23 has a threaded portion 24 on the inner wall (ceiling wall) of the lid 3.
It hangs vertically into the valve chamber 5 and fits into the guide hole 20 of the float 16 . Further, the shoulder between the guide rod 23 and the screw portion 24 is formed into a horizontal plane, and forms a float floating seat 25 that holds the float 16 during floating.

Explain the operation. Steam flows from the inlet 6 to the inflow passage 7
and when flowing into the valve chamber 5 through the inlet 8,
This steam does not flow into the guide hole 20 due to the action of the baffle plate 10 and the restrictor 22, and is prevented from flowing into the introduction opening 1 of the float 16.
8 into the float 16, and the float 16 receives buoyancy and floats up to the state shown in the figure. At this time, the float 16 is guided by the guide rod 23 so that it does not move and can float without getting caught on the inner wall of the valve chamber 5 or the like. In addition, when the float 16 floats up and sits on the valve seat member 12 and closes the valve port 15, the end surface of the guide hole is stably held by the floating seat 25, so that it will not move unintentionally. The valve can be reliably closed without any problems. When condensate flows from the inlet 6 through the inlet passage 7 and inlet 8 into the valve chamber 5, the float 16 reduces its buoyancy and sinks, leaving the valve seat member 12 and opening the valve port 15. At this time, the diameter of the guide rod 25 is smaller than that of the guide hole 20 as shown in the figure, and the float 16 swings about the lower end of the valve seat member 12 as a fulcrum and is easily unseated. Further, during the descent, since it is guided by the guide rod 23, it does not get caught on the inner wall of the valve chamber 5, etc., and is stably held on the rib 11 during the descent.

As described above, according to the present invention, the float is guided by the guide rod fitted into the guide tube, and the float does not get caught on the valve chamber wall or the like and cause steam leakage, and the valve can be opened and closed reliably. can.

[Brief explanation of the drawing]

The figure is a longitudinal cross-sectional view of a bucket and float type steam trap according to an embodiment of the present invention. 1 is the main body, 3 is the lid, 5 is the valve chamber, 6 is the inlet, 8 is the inlet, 10 is the baffle plate, 11 is the rib, 12 is the valve seat member, 14 is the outlet, 15 is the valve port, 16 is the downward bucket 17 is a small vent hole, 18 is an introduction opening, 19 is a guide tube, 20 is a guide hole, 21 is a sealing surface 23 is a guide rod, and 25 is a float floating seat.

Claims (1)

[Claims] 1. A guide tube is attached to the float, penetrating the top wall of a downward bucket float placed freely in the valve chamber and hanging down to the lower liquid area in the foot, and a guide rod hanging from the ceiling wall of the valve chamber is attached to the float. 1. A bucket-float type steam trap, characterized in that the float is fitted into a guide cylinder to guide the float, and a valve port is opened and closed directly on the external sealing surface of the float.