JP2000028093A - Downward bucket type steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a downward bucket type steam trap which may not cause valve leakage by increasing valve closing force. SOLUTION: A valve casing is formed by a body 1 and a cover 3, and an inlet 5, a valve chamber 4 and an outlet 14 are formed in the valve casing. A valve port 15 communicating the valve chamber 4 with the outlet 14 is formed in the upper part of the valve chamber 4. A downward bucket 9 having an introducing opening 11 in its lower part and an air releasing hole 10 in its upper part is stored in the inside of the valve chamber 4. The valve port 15 is opened and closed by a valve element 18 connected to the downward bucket 9 through a lever 17. The air releasing hole 10 arranged in the upper part of the downward bucket 9 is positioned in the lower part of the valve element 18 opening/closing the valve port 15, so that gas delivered from the air releasing hole 10 is collided with the valve element 18 thereby acting as valve closing force on the valve element 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap which is attached to a steam piping system and automatically discharges condensate generated therefrom. And improvement of the downward bucket type steam trap.

[0002]

2. Description of the Related Art A conventional downward bucket type steam trap is disclosed, for example, in Japanese Patent Publication No. 60-32076. This forms an inlet, a valve chamber, and an outlet in the valve casing, and forms a valve port communicating with the valve chamber and the outlet in the upper part of the valve chamber,
A downward bucket having an inlet opening at a lower portion and a vent hole at an upper portion is accommodated in a valve chamber, and a valve port is opened and closed by a valve body connected to the downward bucket via a lever.

[0003] In the above conventional apparatus, when steam flows into the downward bucket from the inlet, the downward bucket receives buoyancy and floats, and the valve element closes the valve port via the lever. When condensate flows into the inlet and the supply of steam into the downward bucket stops, the steam in the downward bucket decreases due to cooling and condensation and escape from the vent holes, and the downward bucket loses buoyancy. The valve body opens the valve port via the lever, and the condensate in the valve chamber is discharged from the valve port to the outlet. When steam flows into the downward bucket due to the discharge of the condensate water, the downward bucket floats again, and the valve element 18 closes the valve port 15 via the lever 17.
Such an operation is repeatedly performed.

[0004]

However, in the above-mentioned conventional apparatus, when the valve body is in the closed state in which the valve port is closed,
Since the valve closing force acting on the valve body is only the fluid pressure on the inlet side, there is a problem that the valve closing force is relatively weak and valve leakage is likely to occur. Therefore, a technical problem of the present invention is to provide a downward bucket type steam trap which does not cause valve leakage by increasing the valve closing force.

[0005]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is that a valve casing is formed with an inlet, a valve chamber and an outlet, and the valve communicates with the valve chamber and the outlet. A mouth is formed in the upper part of the valve chamber, a downward bucket having an introduction opening in the lower part and a vent hole in the upper part is accommodated in the valve chamber, and the valve port is opened and closed by a valve body connected to the downward bucket via a lever. In a downward bucket type steam trap, an exhaust hole provided in an upper portion of a downward bucket is located below a valve body that opens and closes a valve port, so that gas discharged from the exhaust hole hits the valve body. It is.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The downward bucket type steam trap of the present invention has a vent hole provided in the upper part of the bucket below a valve body that opens and closes a valve port, and gas discharged from the vent hole hits the valve body. Therefore, the gas that comes out of the exhaust holes and hits the valve body acts as a valve closing force on the valve body. Therefore, the valve closing force is increased, and no valve leakage occurs.

[0007]

An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A lid 3 is attached to the main body 1 via a gasket 2 for maintaining airtightness to form a valve casing having a valve chamber 4 therein. An entrance 5 at the top of the main body 1 and an entrance 5
The outlet 14 is formed on the same axis. The inlet 5 extends below the valve chamber 4 through the inflow passage 6 and communicates with the valve chamber 4 through an inlet hole 8 of an inlet pipe 7 which is vertically screwed to the bottom wall of the valve chamber 4. The downward bucket 9 is accommodated in the valve chamber 4. The downward bucket 9 is provided with a vent hole 10 in the upper part, and the inlet pipe 7 in the lower part.
Is provided with an introduction opening 11 penetrating therethrough.

A valve seat member 13 is screwed to the lid 3 via a gasket 12 for maintaining airtightness. The valve seat member 13 has a valve port 15 for communicating the valve chamber 4 with the outlet 14. A fulcrum 16 is provided at the lower end of the valve seat member 13, and one end of a lever 17 is swingably connected. A hemispherical valve element 18 for opening and closing the valve port 15 is provided on the fulcrum 16 side of the lever 17 with a snap ring 1.
9 is attached. The other end of the lever 17 is loosely connected to a connecting member 20 fixed to the downward bucket 9. An exhaust hole 10 of the downward bucket 9 is located directly below the valve body 18 so that gas discharged from the exhaust hole 10 hits the valve body 18.

The operation of the downward bucket type steam trap of the above embodiment is as follows. FIG.
Flows into the downward bucket 9 through the introduction hole 8, the downward bucket 9 rises by receiving buoyancy, and the valve element 18 closes the valve port 15 via the lever 17. In this state, the gas such as steam and air in the downward bucket 9 escapes from the vent hole 10 and hits the valve element 18 to act as a valve closing force for the valve element 18. When the condensate flows into the inlet 5 and the supply of steam into the downward bucket 9 stops,
The steam in the downward bucket 9 decreases due to cooling condensation and escape from the vent hole 10, and the downward bucket 9 loses buoyancy and descends,
The valve body 18 opens the valve port 15 via the lever 17 and the valve chamber 4
Is discharged from the valve port 15 to the outlet 14. When steam flows into the downward bucket 9 due to the discharge of the condensate, the downward bucket 9 floats again, and the valve element 18
Closes the valve port 15. Such an operation is repeatedly performed.

[0010]

The present invention has the following specific effects. As described above, in the downward bucket type steam trap according to the present invention, the exhaust hole is located below the valve element, and gas that comes out of the exhaust hole and hits the valve element acts as a valve closing force on the valve element. And an excellent effect that valve leakage does not occur is produced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a downward bucket type steam trap according to an embodiment of the present invention.

[Explanation of symbols]

 4 Valve Chamber 5 Inlet 9 Downward Bucket 10 Vent Hole 11 Inlet Opening 14 Outlet 15 Valve Port 17 Lever 18 Valve Element

Claims (1)

[Claims] An inlet, a valve chamber, and an outlet are formed in a valve casing, and a valve port communicating the valve chamber and the outlet is formed in an upper part of the valve chamber.
A valve body that accommodates a downward bucket having an inlet opening at the bottom and a vent hole at the top in the valve chamber and that opens and closes the valve port with a valve element connected to the downward bucket via a lever. A downward bucket type steam trap characterized in that an exhaust hole provided in an upper portion of a downward bucket is positioned below the downward bucket so that gas discharged from the exhaust hole hits a valve body.