JPH09137895A - Disk type steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk type steam trap in which the interval in operating an opening/closing valve is little changed between the horizontal piping fitting and the perpendicular piping fitting. SOLUTION: A lid member 5 is fitted to a body 1 in which an inlet 2 and an outlet 3 are formed to form a pressure changing chamber 4 in which the inlet and the outlet are open. A valve seat face 9 consisting of inner and outer ring valve seats 6, 7 in the same plane is formed on an opening end of the inlet and the outlet on the pressure changing chamber side. An in-flow hole 11 to communicate the inlet with the pressure changing chamber is formed on the inner ring valve seat face. An annular groove 8 is formed between the inner and outer ring valve seat faces, and an out-flow hole 12 to communicate the pressure changing chamber with the outlet is formed in the annular groove. A disk-shaped valve disk 10 to be attached/detached to/from the valve seat face is arranged in the pressure changing chamber. The in-flow hole is inclined toward the inlet, and the valve seat face is inclined by about 45 deg. toward the inlet relative to the axis of the inlet and the outlet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap for automatically discharging condensate generated in a steam piping system, and more particularly to a valve disk which opens and closes in response to a pressure change in a variable pressure chamber, that is, a thermodynamic steam chamber. Disc type steam trap.

[0002]

2. Description of the Related Art Conventional disk type steam traps are:
For example, as disclosed in Japanese Patent Laid-Open No. 6-34097, a cover member is attached to a main body having an inlet and an outlet to form a transformer chamber in which the inlet and the outlet are opened, and the inlet and outlet transformer chambers are formed. A valve seat surface consisting of a coplanar inner and outer ring valve seat is formed at the side opening end, an inflow hole that connects the inlet and the variable pressure chamber is formed in the inner ring valve seat surface, and an annular groove is formed between the inner and outer ring valve seat surfaces. Then, an outflow hole that communicates the variable pressure chamber and the outlet is formed in the annular groove, and a disk-shaped valve disc that is seated on and off the valve seat surface of the inner and outer ring valve seats is arranged in the variable pressure chamber. The condensate water is automatically discharged by automatically controlling the valve disc by the pressure change of (1) to make the valve disc separate from and seat on the valve seat surface.

[0003]

SUMMARY OF THE INVENTION The conventional disc type steam trap described above has a horizontal pipe mounting in which the inlet and outlet axes are horizontally positioned and the inlet and outlet axes are vertically positioned. The vertical valve mounting has a different opening / closing valve operation interval, and there was a problem that the vertical piping installation had a shorter interval than horizontal piping installation. That is, the inflow hole formed in the direction perpendicular to the axis of the inlet and the outlet extends vertically upward from the inlet if the pipe is mounted horizontally, but it does extend horizontally from the inlet if the pipe is mounted vertically. Becomes Therefore, the condensate generated on the inlet side easily flows into the inflow hole, causing a pressure drop in the variable pressure chamber at an early stage. Further, in the case of horizontal pipe mounting, the valve disc is lifted to open the valve, whereas in the case of vertical pipe mounting, the valve disc is tilted to open the valve, which facilitates the valve opening.

Therefore, a technical object of the present invention is to provide a disc type steam trap in which the opening / closing valve operation interval hardly changes between horizontal pipe mounting and vertical pipe mounting.

[0005]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to mount a lid member on a main body having an inlet and an outlet so that the inlet and the outlet are opened inside. A variable pressure chamber is formed, a valve seat surface consisting of inner and outer ring valve seats on the same plane is formed at the inlet and outlet variable pressure chamber side opening ends, and an inflow hole communicating the inlet and variable pressure chamber is formed on the inner ring valve seat surface. A disc-shaped valve that forms an annular groove between the inner and outer ring valve seat surfaces, forms an outflow hole that communicates the variable pressure chamber and the outlet in the annular groove, and seats on and off the valve seat surface of the inner and outer ring valve seats. A disc type steam trap in which a disc is arranged in a variable pressure chamber, the inflow hole is formed to be inclined toward the inlet side, and the valve seat surface is inclined to the inlet side by about 45 degrees with respect to the axis lines of the inlet and the outlet. It is in.

[0006]

According to the present invention, since the inflow hole is inclined toward the inlet side, it extends obliquely upward from the end of the inlet regardless of whether horizontal pipe mounting or vertical pipe mounting, Condensed water will not flow in easily regardless of the vertical pipe installation. Further, since the valve seat surface is inclined to the inlet side with respect to the axis of the inlet and the outlet by about 45 degrees, the valve disc is inclined by about 45 degrees regardless of whether the pipe is mounted horizontally or vertically. The valve opening operation of the valve disc hardly changes regardless of horizontal or vertical pipe installation.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). An inlet 2 and an outlet 3 are formed on the same axis on the main body 1, and a transformer chamber 4 communicating with the inlet 2 and the outlet 3 is formed by the lid member 5 and the main body 1. An inner ring valve seat 6 and an outer ring valve seat 7 are formed concentrically at the opening ends of the inlet 2 and the outlet 3 on the side of the variable pressure chamber 4 and an annular groove 8 is formed between them, and the upper ends of the valve seat surface 9 are flush with each other. To do. The valve seat surface 9 is formed so as to be inclined at an angle of about 45 degrees toward the inlet 2 side with respect to the axes of the inlet 2 and the outlet 3. A disc-shaped valve disc 10 is arranged on the valve seat surface 9. The inlet 2 and the variable pressure chamber 4 are the inflow hole 1 formed in the inner ring valve seat 6.
Communicate via 1. The inflow hole 11 is inclined toward the inlet 2 side with respect to an axis perpendicular to the axes of the inlet 2 and the outlet 3. The variable pressure chamber 4 and the outlet 3 communicate with each other through an outflow hole 12 formed in the annular groove 8.

Next, the operation will be described. When steam does not stay in the variable pressure chamber 4, the pressure of the condensate that has flowed in from the inlet 2 acts in the valve opening direction of the valve disc 10 via the inflow hole 11, so that the valve disc 10 is seated. Separated from the surface 9, the condensate is discharged to the outlet 3 through the outflow hole 12. When the discharge of the condensate is completed and steam begins to flow in through the inlet 2,
The steam immediately fills the variable pressure chamber 4, and the lower surface of the valve disk 10 flows down at a high speed, so that the lower surface of the valve disk 10 decreases in static pressure, and the valve disk 10 is seated on the valve seat surface 9. The valve closing force in this case is a force that loads the valve disc 10 toward the valve seat surface 9 by the steam pressure in the variable pressure chamber 4, and a valve opening direction of the valve disc 10 by the steam pressure on the inlet 2 side from the inflow hole 11. It is caused by the difference between the force applied to and. When the pressure of the steam retained in the variable pressure chamber 4 decreases due to heat radiation or the like, the force pressing the valve disk 10 against the valve seat surface 9 also decreases. When this valve closing force becomes lower than the valve opening force acting from the inflow hole 11, the valve disc 10 opens.

In the case of the horizontal pipe mounting of FIG. 1 in which the axes of the inlet 2 and the outlet 3 are horizontally positioned, the inflow hole 11 extends obliquely upward from the end of the inlet 2 and the valve seat surface 9 is connected to the inlet 2. It is inclined to the inlet 2 side by about 45 degrees with respect to the axis of the outlet 3.
Even if it is rotated 90 degrees clockwise from the state shown in FIG. 1 to change to a vertical pipe mounting in which the axes of the inlet 2 and the outlet 3 are positioned in the vertical direction, the inflow hole 11 is obliquely upward from the end of the inlet 2. The valve seat surface 9 extends toward the inlet 2 side with respect to the axes of the inlet 2 and the outlet 3 by about 45 degrees. This allows
The open / close valve operation interval is almost unchanged between horizontal piping installation and vertical piping installation.

[0010]

As described above, according to the present invention, the interval of the on-off valve operation hardly changes between the horizontal pipe mounting and the vertical pipe mounting. Has the same structure as the interface for optimal opening / closing valve operation.
It is possible to provide a disc-type steam trap obtained by Baru.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a disk type steam trap of the present invention.

[Explanation of symbols]

 1 Main Body 2 Inlet 3 Outlet 4 Transformer Chamber 5 Lid Member 6 Inner Ring Valve Seat 7 Outer Ring Valve Seat 8 Annular Groove 9 Valve Seat Surface 10 Valve Disc 11 Inlet Hole 12 Outlet Hole

Claims (1)

[Claims] 1. A transformation chamber having an inlet and an outlet formed therein by attaching a lid member to a main body having an inlet and an outlet formed therein.
A valve seat surface consisting of the inner and outer ring valve seats on the same plane is formed at the inlet and outlet sides of the variable pressure chamber side, and an inflow hole that connects the inlet and the variable pressure chamber is formed on the inner ring valve seat surface. An annular groove is formed between them, and an outflow hole that communicates the variable pressure chamber and the outlet is formed in the annular groove, and a disc-shaped valve disc that is seated on and off the valve seat surface of the inner and outer ring valve seat is arranged in the variable pressure chamber. In the disk steam trap, the inlet hole is formed to be inclined toward the inlet side, and the valve seat surface is formed to be inclined toward the inlet side by about 45 degrees with respect to the axis lines of the inlet and the outlet.