JP3423779B2 - Disc type steam trap - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variety of steam-using devices and equipment using a valve disk which opens and closes in response to a pressure change in a transformer chamber, that is, a thermodynamic steam chamber. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk type steam trap for automatically discharging condensate generated in a steam pipe, and more particularly to a large amount of disk type steam trap capable of discharging a large amount of condensate. 2. Description of the Related Art The basic structure of a disk type steam trap is as follows. A lid is fixed to a main body having an inlet and an outlet to form a variable pressure chamber therein, and an ejection hole opened at the center of the variable pressure chamber is formed. To provide communication between the inlet and the variable pressure chamber, to provide an annular groove that opens around the outer periphery of the ejection hole, and to provide an inner ring valve seat between the ejection hole and the annular groove.
An outer ring valve seat is formed around the outer periphery of the annular groove, a single discharge hole is provided from the annular groove, and the variable pressure chamber communicates with the outlet through the annular groove and the discharge hole, and a valve seat surface including an inner ring valve seat and an outer ring valve seat is provided. A flat disk-shaped valve disk that is separated from and seated on the variable pressure chamber is disposed in the variable pressure chamber, and the valve disk automatically separates and seats on the valve seat surface according to the pressure change of the variable pressure chamber, that is, the thermodynamic steam chamber. To automatically discharge condensate. [0003] In the above-mentioned conventional disk type steam trap, since the annular groove and the outlet communicate with each other through a discharge hole smaller than the passage cross-sectional area of the annular groove, the flow path of the channel is reduced. However, there was a problem that the discharge capacity was small due to narrowing down, and it was not suitable for discharging a large amount of condensate. Therefore, the technical problem of the present invention is:
An object of the present invention is to provide a large amount of disk type steam trap capable of discharging a large amount of condensate. [0004] The technical means of the present invention which has been taken to solve the above technical problems, are formed on the same axis.
A lid is fixedly attached to the main body having the formed inlet and outlet to form a transformation chamber inside, and an ejection hole is provided at the center of the transformation chamber to provide communication between the inlet and the transformation chamber. Provide an annular groove to the inner ring valve seat between the ejection hole and the annular groove,
An outer ring valve seat is formed around the outer periphery of an annular groove, and a disc-shaped valve disk which is separated from and seated on a valve seat surface including an inner ring valve seat and an outer ring valve seat is disposed in a variable pressure chamber. Are connected directly to the outlet, and a substantially hemispherical convex portion is provided at the center of the side surface of the valve seat of the valve disk. The operation of the above technical means is as follows.
Since the end of the annular groove communicates directly with the outlet, the flow path from the annular groove to the outlet is not restricted. As a result, the condensate flowing out of the ejection hole can smoothly flow down from the annular groove to the outlet, and the discharge capacity increases. Here, if the condensate flowing out from the ejection hole smoothly flows down to the outlet, there is a risk that the pressure rise in the transformer chamber may be hindered.However, a substantially hemispherical convex portion is provided at the center of the valve seat side surface of the valve disk. As a result, a part of the condensate flowing out of the ejection hole easily flows from the lower surface of the valve disc to the side surface along the substantially hemispherical surface of the convex portion, so that the pressure change in the variable pressure chamber as in the related art is reduced. It will be performed well. An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A transformer 2 is formed by screwing a lid 2 to the main body 1. An inlet 4 and an outlet 5 are formed on the main body 1 on substantially the same axis. An ejection hole 6 opening at the center of the transformation chamber 3 is opened in the main body 1, and the inlet 4 and the transformation chamber 3 are connected through the ejection hole 6. A screen 7 is disposed in a flow path between the inlet 4 and the ejection hole 6. An annular groove 8 is provided around the outer periphery of the ejection hole 6 to form an annular inner ring valve seat 9 between the ejection hole 6 and the annular groove 8, and an annular outer ring valve seat 10 is formed around the outer periphery of the annular groove 8. . The inner ring valve seat 9 and the outer ring valve seat 10 are concentric and formed on the same plane. The end of the annular groove 8 is directly connected to the outlet 5, and the variable pressure chamber 3 and the outlet 5 are communicated only through the annular groove 8.
A disk-shaped valve disk 11 which is detachably seated on the upper and lower valve seats of the inner ring valve seat 9 and the outer ring valve seat 10 to open and close the valve is disposed in the variable pressure chamber 3 in a free state. A substantially hemispherical convex portion 12 is provided at the center of the side surface of the valve disc 11. Next, the operation will be described. When no steam is retained in the variable pressure chamber 3, the valve disc 11
The fluid pressure at the inlet 4 acting on the valve disc 11
Is separated from the inner and outer ring valve seats 9 and 10 to condense low-temperature condensate
To the outlet 5 via. Here, since the end of the annular groove 8 communicates directly with the outlet 5 and the flow path is not narrowed, a large amount of condensate is quickly discharged. In the center of the lower surface of the valve disk 11
A substantially hemispherical convex part 12 is provided, and a part of the condensate is almost
Since the flow from the lower surface of the valve disk 11 to the side surface is easy along the hemisphere , when the high-temperature condensate starts flowing from the inlet 4, a part of the high-temperature condensate quickly flows into the transformer chamber 3 and immediately re-evaporates. And fill. In addition, high temperature condensate
Flows down at a high speed, so that the lower surface of the valve disk 11 has a reduced static pressure, whereby the valve disk 11 is seated on the inner and outer ring valve seats 9, 10. When the vapor in the variable pressure chamber 3 is condensed by heat radiation or the like and the pressure decreases, the valve disk 11 opens. As described above, according to the present invention, the condensate can smoothly flow down to the outlet without being constricted. Can be discharged quickly without stagnation. Therefore, the steam using equipment may be damaged,
There is no danger of generating water hammer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an embodiment of a disk type steam trap of the present invention. [Description of Signs] 1 Main body 2 Lid 3 Transformation chamber 4 Inlet 5 Outlet 6 Spout hole 8 Annular groove 9 Inner ring valve seat 10 Outer ring valve seat 11 Valve disk 12 Convex place

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Claims (1)

(57) [Claims 1] An injection hole which is formed by fixing a lid to a main body having an inlet and an outlet formed on the same axis to form a variable pressure chamber therein, and which is opened at the center of the variable pressure chamber. To provide communication between the inlet and the variable pressure chamber, provide an annular groove that opens around the outer periphery of the ejection hole, form an inner ring valve seat between the ejection hole and the annular groove, and form an outer ring valve seat around the outer periphery of the annular groove. A disk-shaped valve disc, which is seated and unseated on a valve seat surface comprising an inner ring valve seat and an outer ring valve seat, is disposed in the variable pressure chamber, the end of the annular groove is directly communicated with the outlet, and the valve of the valve disc is A disc-type steam trap characterized in that a substantially hemispherical convex portion is provided at the center of the seat side.