JPH0637270Y2 - Disc type steam trap - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to a disc type steam trap which is attached to a steam piping system to automatically discharge condensate generated therein.
In particular, it relates to a valve disc that can be opened and closed by being displaced in parallel with the valve seat surface.

Conventional technology In a conventional disc type steam trap, a main body and a lid form a variable pressure chamber inside, and an injection hole is opened in the center of the main body on the variable pressure chamber side so that the inlet and the variable pressure chamber communicate with each other. An annular groove is provided in the periphery, an inner ring valve seat is formed between the ejection hole and the annular groove, and an outer ring valve seat concentric with and coplanar with the inner ring valve seat is formed on the outer periphery of the annular groove. A disk-shaped valve disk is provided in the variable pressure chamber so that the variable pressure chamber is communicated with the outlet by opening a discharge hole, and the valve disc seats on and off a valve seat surface composed of an inner ring valve seat and an outer ring valve seat. The valve disc is automatically controlled by the pressure change in the variable pressure chamber to be seated on or off the valve seat surface, and the condensate is automatically discharged.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the disc type steam trap described above, since the annular groove and the outlet communicate with each other through a single discharge hole located outside the discharge hole, the valve is discharged from the discharge hole. Of the discharge flow that passes through the lower surface of the disc and flows out from the annular groove to the discharge hole, the flow velocity at the portion of the valve disc that faces directly above the discharge hole is higher than the other, and the valve disc is attracted to the discharge hole side. There is a problem that the valve disc and the valve seat exhaust hole side are reduced due to opening and closing in a tilted state.

Therefore, the technical problem of the present invention is to enable the valve disc to be displaced parallel to the valve seat surface to open and close.

MEANS FOR SOLVING THE PROBLEM The technical means of the present invention taken to solve the above-mentioned technical problem is to form a variable pressure chamber inside with a main body and a lid, and eject the gas into the center of the main body on the variable pressure chamber side. A hole is made to communicate with the inlet and the variable pressure chamber, an annular groove is provided on the outer circumference of the ejection hole, an inner ring valve seat is provided between the ejection hole and the annular groove, and a concentric circle with the inner ring valve seat is provided on the outer circumference of the annular groove. A disc-shaped outer ring valve seat with the same plane, a single discharge hole is opened from the annular groove to connect the variable pressure chamber to the outlet, and is seated on and off the valve seat surface consisting of the inner ring valve seat and the outer ring valve seat. In which the valve disc is arranged in the variable pressure chamber, an orifice having a diameter smaller than that of the annular groove is formed above the discharge hole of the annular groove.

Action The action of the above technical means is as follows.

Due to the orifice formed above the discharge hole, of the discharge flow that flows from the ejection hole to the lower surface of the valve disk and out of the annular groove to the discharge hole, the flow velocity of the discharge flow that flows from above the orifice to the discharge hole. Can be reduced to approximately the same as the flow velocity of the discharge flow flowing from the periphery of the orifice to the discharge hole. Therefore, the flow velocity of the discharge flow flowing under the valve disc becomes uniform, the valve disc is not attracted to the discharge hole side and is not inclined, and the valve disc can be displaced parallel to the valve seat surface to open and close.

Effect of the Invention The present invention has the following unique effects.

As described above, according to the present invention, the valve disc is displaced in parallel with the valve seat surface to open and close, so that uneven wear does not occur and desired good performance can be maintained for a long period of time.

Also, the displacement of the valve disc parallel to the valve seat surface increases the discharge flow rate.

Example An example showing a specific example of the above technical means will be described (see FIG. 1).

The lid 2 is screwed to the main body 1 to form the transformer chamber 3 inside. An inlet 5 and an outlet 6 are formed in the main body 1 on substantially the same axis.

An injection hole 7 is opened in the center of the main body 1 so that the inlet 5 and the variable pressure chamber 3 can communicate with each other. An annular groove 9 is provided on the outer periphery of the ejection hole 7,
An annular inner ring valve seat 10 is formed between the ejection hole 7 and the annular groove 9, and an annular outer ring valve seat 11 is formed on the outer periphery of the annular groove 9. Inner ring valve seat 10
The outer ring valve seat 11 and the outer ring valve seat 11 are concentrically formed on the same plane. The discharge hole 12 is opened from the annular groove 9 to connect the variable pressure chamber 3 and the outlet 6.

In the variable pressure chamber 3, a disc-shaped valve disk 13 is arranged which is seated on and off the inner and outer ring valve seats 10 and 11 at the same time.

The orifice plate 15 is attached to the annular groove 9. Orifice plate
15 is located above the discharge hole 12, and is fixed by press-fitting it into a step portion formed slightly larger in the annular groove 9. Orifice plate 15
Has an orifice 16 with an opening area smaller than the diameter of the discharge hole 12.
Open.

When the valve disc 13 is opened, the fluid in the ejection hole 7 is in the annular groove 13
To the discharge hole 12, but at this time, a part of the discharge flow passes through the orifice 16 and the other flows out to the discharge hole 12 without passing through the orifice 16.

[Brief description of drawings]

FIG. 1 is a sectional view of a disk type steam trap according to an embodiment of the present invention. 1: Main body, 2: Lid 3: Transformer chamber, 5: Inlet 6: Outlet, 9: Annular groove 10: Inner ring valve seat, 11: Outer ring valve seat 12: Discharge hole, 13: Valve disc 15: Orifice plate, 16 : Orifice

Claims (1)

[Scope of utility model registration request] 1. A main body and a lid form a variable pressure chamber inside, and an injection hole is opened in the center of the main body on the variable pressure chamber side so that the inlet and the variable pressure chamber communicate with each other, and an annular groove is provided around the outer periphery of the injection hole. The inner ring valve seat between the injection hole and the annular groove, and the outer ring valve seat concentric with the inner ring valve seat and flush with the inner surface of the annular groove. A disc-shaped valve disc that connects the chamber to the outlet and seats on and off the valve seat surface consisting of the inner ring valve seat and the outer ring valve seat is located above the discharge hole of the annular groove in the variable pressure chamber. A disc-type steam trap that has an orifice with a smaller diameter than the annular groove.