JP2835664B2 - Disc type steam trap - Google Patents

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.
The present invention relates to a disk type steam trap that opens and closes a valve disk in response to a pressure change in a variable pressure chamber, that is, a thermodynamic steam chamber.

[0002]

2. Description of the Related Art An example of a conventional disk type steam trap is disclosed in Japanese Utility Model Laid-Open No. 3-130997. In this method, a transformation chamber is formed inside the main body and the lid, and a valve seat surface including inner and outer ring valve seats is formed at an opening end of the transformation chamber on the inlet and outlet, and an annular groove is formed between the inner and outer ring valve seats. A single discharge hole was opened from the annular groove, the variable pressure chamber was communicated with the outlet, and an orifice smaller than the annular groove was formed above the discharge hole of the annular groove, and a valve disk was arranged in the variable pressure chamber. By automatically controlling the valve disc by the pressure change of the variable pressure chamber and taking it off and on the valve seat surface, the condensate water is automatically discharged, and the small diameter orifice is provided, so that the lower face of the valve disc is provided. The flow velocity of the exhaust flow flowing through the valve disk becomes uniform, and the valve disk can be opened in parallel with the valve seat surface.

[0003]

In the above-mentioned conventional disk type steam trap, since the valve disk can be opened in parallel, there is little uneven wear of the valve disk and a long life can be obtained. By providing the fixed orifice, the discharge flow on the lower surface of the valve disk cannot be made uniform depending on the fluid pressure, and the problem that the valve disk tilts remains. The steam trap is used under various pressure conditions from low pressure of 1 kg or less to medium pressure of about 10 kg or high pressure of 30 km or more. Even if an orifice that does not tilt the valve disc at low pressure is selected, it will be effective at high pressure You will not be able to do it. If the pressure is different, the orifice must be replaced.

Accordingly, the technical problem of the present invention is that the valve discs are opened in parallel so that the flow velocity of the discharge flow on the lower surface of the valve disc becomes uniform at any fluid pressure, causing uneven wear. The goal is to obtain a disk-type steam trap without any problems.

[0005]

According to the technical means of the present invention taken to solve the above technical problem, a cover member is attached to a main body having an inlet and an outlet, and the inlet and the outlet are opened inside. A variable pressure chamber is formed, a valve seat surface including an inner and outer ring valve seat is formed at a variable pressure chamber side open end of an inlet and an outlet, and an inlet hole communicating the inlet and the variable pressure chamber is formed in the inner ring valve seat surface, and the inner and outer ring valves are formed. An annular groove was formed between the seating surfaces, an outlet hole communicating the variable pressure chamber and the outlet was formed in the annular groove, and a valve disk that was detachably seated on the valve seat surface of the inner and outer ring valve seats was disposed in the variable pressure chamber. In things, entrance
Perpendicular to the central axis connecting the
A plurality of outflow holes are evenly provided such that the center line of the outflow is located.

[0006]

The operation of the above technical means is as follows.
Perpendicular to the central axis connecting the inlet and outlet and on the center line of the inlet
The plurality of outflow holes are provided evenly so that the center line is located at the center line, so that the fluid flowing from the inflow hole into the variable pressure chamber, that is, the lower surface of the valve disk, is centered on the axis of the inflow hole. It flows down front, back, left and right evenly and is discharged from the outflow hole to the outlet. By equalizing the discharge flow under the valve disc,
The valve disc can be opened in parallel without tilting. The diameter of the outlet hole may be any size that can discharge the supply amount from the inlet hole, and the valve disk opens in parallel regardless of the fluid pressure because the flow path is not restricted. be able to.

[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 6 and an outer ring 7 are formed concentrically at the opening ends of the inlet 2 and the outlet 3 on the side of the transformation chamber 4 to form an annular groove 13 therebetween, and the upper end is a valve seat surface 8. A disc-shaped valve disk 9 is arranged on the valve seat surface 8. The inlet 2 and the transformation chamber 4 are formed by an inflow hole 10 formed in the inner race 6.
To communicate through. The variable pressure chamber 4 and the outlet 3 communicate with each other through outflow holes 11 and 12 formed in the annular groove 13. Outflow hole 1
1 and 12 are vertically even in FIG.
Perpendicular to the center axis connecting the outlets 3 and on the center line of the inflow hole 10
Is provided so that the center line is located at the center. Outflow holes 11, 1
2 is also provided so as to be located at the center of the inlet 2 and the outlet 3.

Next, the operation will be described. When steam does not accumulate in the variable pressure chamber 4, the condensate pressure flowing from the inlet 2 acts in the valve opening direction of the valve disk 9 through the inlet hole 10, so that the valve disk 9 moves the valve seat 9. The condensate is discharged from the surface 8 to the outlet 3 through the outflow holes 11 and 12.
When the discharge of the condensate is completed and steam starts to flow in from the inlet 2, the steam immediately fills the transformer chamber 4 and
By flowing down the lower surface of the valve disk 9 at high speed, the lower surface of the valve disk 9 decreases in static pressure, and the valve disk 9 is seated on the valve seat surface 8. In this case, the valve closing force includes a force applied to the valve disk 9 in the direction of the valve seat surface 8 by the steam pressure in the variable pressure chamber 4 and a load applied to the valve disk 9 in the valve opening direction by the inlet 2 steam pressure from the inflow hole 10. It is caused by the difference with the force to be applied.

When the pressure of the steam retained in the variable pressure chamber 4 decreases due to heat radiation or the like, the force of pressing the valve disk 9 against the valve seat surface 8 also decreases. When the valve closing force is lower than the valve opening force acting from the inflow hole 10, the valve disk 9 opens. In the present embodiment, a plurality of outflow holes 11 and 12 are provided.
Is perpendicular to the central axis connecting the inlet 2 and the outlet 3 and
0, so that the center line is evenly located on the center line , the flow resistance of the fluid from the inflow hole 10 to the outlet 3 in the outflow holes 11 and 12 becomes equal, so that the valve disk 9 Since the flow velocity of the fluid passing through the lower surface becomes uniform and the valve disc 9 opens in parallel without tilting, the valve disc 9 does not have uneven wear.

[0010]

As described above, according to the present invention, the valve disk can be opened in parallel regardless of the fluid pressure, and the life of the valve disk can be extended without uneven wear. Can be.

[Brief description of the drawings]

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

FIG. 2 is a partial cross-sectional view taken along line AA in FIG.

[Description of Signs] 1 Main body 2 Inlet 3 Outlet 4 Transformation chamber 5 Lid member 6 Inner ring 7 Outer ring 8 Valve seat surface 9 Valve disk 10 Inflow holes 11, 12 Outflow holes 13 Annular groove

Claims (1)

(57) [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 including inner and outer ring valve seats is formed at the opening end of the inlet and outlet at the side of the variable pressure chamber, an inlet hole communicating the inlet and the variable pressure chamber is formed at the inner ring valve seat surface, and a ring is formed between the inner and outer ring valve seat surfaces. Form a groove,
Forming an outflow hole in the annular groove communicating the transformation chamber and the outlet,
A valve disk that is seated on the valve seat surface of the inner and outer ring valve seats is arranged in the variable pressure chamber, and is orthogonal to the central axis connecting the inlet and outlet.
A plurality of outflow holes are provided evenly so that the center line is located on the center line of the inflow hole .