JP2562389Y2 - 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 disk type steam trap which is attached to a steam piping system and automatically discharges condensate generated therein, and in particular, a valve disk is parallel to a valve seat surface of an inner and outer ring valve seat. That can be opened and closed by being displaced.

[0002]

2. Description of the Related Art Conventional disk type steam traps are:
A transformation chamber is formed inside the main body and the lid, an ejection hole is opened at the center of the transformation chamber side of the main body, and the inlet and the transformation chamber are connected, and an annular groove is provided around the periphery of the ejection hole. An inner ring valve seat is formed between the annular grooves, and an outer ring valve seat is formed concentrically with the inner ring valve seat on the outer periphery of the annular groove, and a single discharge hole is opened from the annular groove to communicate the variable pressure chamber with the outlet. At least, a disc-shaped valve disk which is separated from and seated on a valve seat surface composed of an inner ring valve seat and an outer ring valve seat is disposed in the variable pressure chamber. The valve disc is automatically controlled by the pressure change of the variable pressure chamber to be separated from and seated on the valve seat surface, and the condensate is automatically discharged.

[0003]

In the above-mentioned disk type steam trap, the annular groove and the outlet communicate with each other through a single discharge hole located outside the discharge hole. Of the discharge flow passing through the lower surface of the valve disk and flowing out of the annular groove to the discharge hole, the flow velocity at the portion facing directly above the discharge hole of the valve disk is larger than the others, and the valve disk sucks toward the discharge hole side There is a problem that the valve disc and the valve hole are partially opened and closed, and the discharge hole side of the valve disc and the valve seat is reduced.

Accordingly, a technical problem of the present invention is to enable a valve disc to be opened and closed by being displaced in parallel with a valve seat surface of an inner and outer ring valve seat.

[0005]

Means for Solving the Problems In order to solve the above-mentioned technical problem, the technical means of the present invention is to form a transformer chamber inside the main body and the lid, and to set the center of the main body on the transformer chamber side. In order to communicate the inlet and the variable pressure chamber by opening a vent hole, an annular groove is provided around the outside of the vent hole, and an inner ring valve seat is provided between the vent hole and the annular groove.
An outer ring valve seat is formed concentrically with the inner ring valve seat on the outer periphery of the annular groove and is flush with the inner ring valve seat.A single discharge hole is opened from the annular groove to allow the variable pressure chamber to communicate with the outlet. In the variable pressure chamber, a disc-shaped valve disc which is detached and seated from the valve seat surface is formed in a portion outside the discharge hole of the outer ring valve seat, and the ejection hole communicates with the small groove. It is one in which pores were formed.

[0006]

The operation of the above technical means is as follows.
The inlet-side fluid is supplied to the narrow groove formed outside the discharge hole of the outer ring valve seat through a fine hole communicating with the ejection hole and the fine groove. The inlet fluid supplied to the narrow groove acts as a force for lifting the valve disk. Therefore, when the valve disk is opened, the fluid ejected from the narrow groove cancels the force of tilting the valve disk due to the suction action of the exhausted fluid, so that the valve disk is brought into contact with the valve seat surface of the inner and outer ring valve seats. It can be opened and closed with parallel displacement.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of the above technical means will be described (FIG. 1).
reference). A cover 2 is screwed to the main body 1 to form a transformer chamber 3 inside.
To form An inlet 5 and an outlet 6 are formed on the main body 1 on substantially the same axis.

An outlet 7 is opened at the center of the main body 1 so that the inlet 5 and the transformer chamber 3 communicate with each other. An annular groove 9 is provided around the outer periphery of the ejection hole 7, and 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 around the outer periphery of the annular groove 9. The inner ring valve seat 10 and the outer ring valve seat 11 are concentric and formed on the same upper surface of the valve seat surface. A single discharge hole 12 is opened from the annular groove 9 to make the transformer chamber 3 communicate with the outlet 6.
A disk-shaped valve disc 13 which is simultaneously detached from and seated on the inner and outer ring valve seats 10 and 11 is arranged in the variable pressure chamber 3.

A narrow groove 14 is formed in the outer ring valve seat 11. Narrow groove 1
4 is located outside the discharge hole 12. A fine hole 15 communicating the ejection hole 7 and the narrow groove 14 is formed. In this embodiment, one narrow groove 14 is formed, but a plurality of narrow grooves 14 may be formed.
The fluid in the ejection hole 7 is supplied to the narrow groove 14 through the small hole 15 and acts as a force for lifting the valve disk 13. Therefore, when the valve disc 13 is opened, the force of tilting the valve disc 13 due to the suction action of the discharged fluid is canceled, and the valve disc 13 is displaced in parallel with the valve seat surfaces of the inner and outer ring valve seats 10 and 11. Open and close.

[0010]

[Effects of the Invention] The present invention has the following specific effects. According to the present invention as described above, the valve disk is opened and closed by being displaced in parallel with the valve seat surface, so that there is no one-sided reduction,
Good initial performance can be maintained for a long time. In addition, the displacement flow of the valve disc can be increased in parallel with the valve seat, thereby increasing the discharge flow rate.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Transformation chamber 5 Inlet 6 Outlet 9 Annular groove 10 Inner ring valve seat 11 Outer ring valve seat 12 Drain hole 13 Valve disk 14 Narrow groove 15 Fine hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A transformation chamber is formed inside a main body and a lid,
An injection hole is opened at the center of the main body on the side of the transformation chamber to make the inlet and the transformation chamber communicate with each other, an annular groove is provided around the periphery of the ejection hole, and an inner ring valve seat is provided between the ejection hole and the annular groove. An outer ring valve seat is formed concentrically with the inner ring valve seat and is flush with the inner ring valve seat.A single discharge hole is opened from the annular groove to connect the variable pressure chamber to the outlet, and a valve seat surface consisting of the inner ring valve seat and the outer ring valve seat In the variable pressure chamber, a disc-shaped valve disk that separates and seats is formed with a narrow groove outside the discharge hole of the outer ring valve seat to form a fine hole that communicates with the ejection hole and the fine groove. Disc type steam trap.