JPH0534395U - Disk type steam trap - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the valve disc to be opened and closed by displacing it parallel to the valve seat surface. [Structure] A protrusion 15 is formed so as to protrude downward around the inner surface of the upper wall of the lid body 2. Even if the opened valve disc 13 tilts due to the suction action of the discharged fluid, the distance from the center of the valve disc 13 to the D portion where the upper surface of the valve disc 13 and the projection 15 abut is long. With the portion as a fulcrum, it is rotated counterclockwise by the jet flow from the ejection hole 7 while being displaced in a posture parallel to the valve seat surface and fully opened.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc type steam trap which is attached to a steam piping system and automatically discharges condensed water generated there, and in particular, the valve disc can be fully opened by being displaced parallel to the valve seat surfaces of the inner and outer ring valve seats. About what you did.

[0002]

[Prior Art]

 A conventional disc type steam trap will be described with reference to FIG. The main body 1 and the lid 2 form a variable pressure chamber 3 inside, and an injection hole 7 is opened in the center of the main body on the variable pressure chamber 3 side so that the inlet 5 and the variable pressure chamber 3 communicate with each other. An annular groove 9 is provided to form an inner ring valve seat 10 between the ejection hole 7 and the annular groove 9 and an outer ring valve seat 11 concentric with the inner ring valve seat 10 and flush with the outer periphery of the annular groove 9. A disc-shaped valve disc that opens a single discharge hole 12 from the groove 9 to connect the pressure-changing chamber 3 to the outlet 6 and seats on and off the valve seat surface composed of the inner ring valve seat 10 and the outer ring valve seat 11. 13 is placed in the variable pressure chamber 3, and a protrusion 14 protruding downward is formed at the center of the inner surface of the upper wall of the lid 2. The valve disk 13 is automatically controlled by the pressure change in the variable pressure chamber 3 to separate from and sit on the valve seat surface, and the condensate is automatically discharged. A part of it is passed between the outer peripheral surface of the valve disk 13 and the inner peripheral surface of the lid 2 to flow into the upper part of the valve disk 13 to prevent the valve disk 13 from sticking to the upper surface of the variable pressure chamber 3 and to close it. Prevent the valve from being delayed or unable to close.

[0003]

[Problems to be solved by the present invention]

 In the disc type steam trap, when the vapor in the variable pressure chamber 3 is condensed and the pressure is lowered, and the pressure on the inlet 5 side from the ejection hole 7 acting on the valve disc 13 is overcome, the valve disc 13 is lifted. To open the valve. The valve disc 13 is opened as shown in FIG. 2 in a tilted state. That is, in the state where the discharge hole 12 side of the lower surface of the valve disc 13 abuts on the outer peripheral upper end (A portion) of the outer ring valve seat 11, and the opposite side of the upper surface discharge hole 12 abuts on the outer peripheral lower end (B portion) of the protrusion 14. is there. This is because the annular groove 9 and the outlet 6 communicate with each other through a single discharge hole 12 located outside the ejection hole 7, so that the ejection groove 7 passes through the lower surface of the valve disc 13 and the annular groove 9 In the discharge flow flowing out from the discharge hole 12 to the discharge hole 12, the flow velocity of the portion of the valve disc 13 facing directly above the discharge hole 12 is higher than that of the other portion, and the portion of the lower face of the valve disc 13 facing the discharge hole is sucked. This is because they are sent. There was a problem that the desired discharge flow rate could not be obtained due to the valve opening in the half-open state where the valve disc was inclined.

Therefore, a technical problem of the present invention is to allow the valve disc to be fully opened by being displaced to a posture parallel to the valve seat surfaces of the inner and outer ring valve seats after the valve disc is tilted.

[0005]

[Means for Solving the Problems]

 The technical means of the present invention taken to solve the above-mentioned technical problem is that a main body and a lid form a variable pressure chamber inside, and an injection hole is opened at the center of the main body on the variable pressure chamber side to form an inlet and a variable pressure chamber. The chambers are communicated with each other, and an annular groove is provided around the outer periphery of the ejection hole.An inner ring valve seat is located between the ejection hole and the annular groove, and an outer ring valve seat concentric with the inner ring valve seat is flush with the outer periphery of the annular groove. A single exhaust hole is opened from the annular groove to connect the variable pressure chamber to the outlet, and the disk-shaped valve disc that is seated on and away from the valve seat surface consisting of the inner ring valve seat and the outer ring valve seat is formed in the variable pressure chamber. In the arranged one, a protrusion protruding downward is formed around the inner surface of the upper wall of the lid.

[0006]

[Action]

 The operation of the above technical means is as follows. When the opened valve disc tilts due to the suction action of the discharged fluid, the discharge hole side of the lower surface abuts the outer peripheral upper end of the outer ring valve seat, and the opposite side of the discharge hole of the upper surface moves downward around the inner surface of the upper wall of the lid. It is formed by projecting it and contacts the lower surface of the projection. Since the protrusion is formed by projecting downward around the inner surface of the top wall of the lid, the distance from the center of the valve disc where the jet flow from the ejection hole acts to the part where the upper face of the valve disc contacts the protrusion is long. Become. As a result, the jet flow from the jet hole causes the valve disc 13 to rotate about the contact point between the upper surface of the valve disc and the protrusion, and is displaced to a posture parallel to the valve seat surface to be fully opened.

[0007]

【Example】

 A specific example of the above technical means will be described (see FIG. 1). The same components as those of the conventional example shown in FIG. 2 will be described with the same reference numerals. The lid 2 is screwed to the main body 1 to form the transformation 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. The inner ring valve seat 10 and the outer ring valve seat 11 are concentric and are formed on the upper surfaces thereof in the same plane. A single 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. A protrusion 15 protruding downward is formed around the inner surface of the upper wall of the lid body 2. Four protrusions 15 are formed on the left side and the right side and on the front side. The protrusion 15 is formed integrally with the lid 2 by using lost wax.

When the valve disc 13 that has been opened tilts due to the suction action of the discharged fluid, the discharge hole 12 side of the lower surface thereof abuts the outer peripheral upper end (C portion) of the outer ring valve seat 11, and the opposite side of the upper surface discharge hole 12 is formed. It contacts the lower surface (D portion) of the protrusion 15. Since the distance from the center of the valve disc 13 on which the jet flow from the ejection hole 7 acts to the D portion where the upper surface of the valve disc 13 and the projection 15 contact is long, the valve disc 13 is rotated counterclockwise with the D portion as a fulcrum. While rotating, it displaces to a position parallel to the valve seat surface and fully opens.

[0009]

[Effect of the device]

 The present invention has the following unique effects. As described above, according to the present invention, since the protrusion is formed around the inner circumference of the upper wall of the lid, the valve disc can be displaced to the fully open position parallel to the valve seat surface, and the discharge flow rate increases.

[Brief description of drawings]

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

FIG. 2 is a sectional view of a conventional disc type steam trap.

[Explanation of symbols]

 1 Main Body 2 Lid Body 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 Protrusion

Claims (1)

[Scope of utility model registration request] 1. A transformer chamber is formed inside by a main body and a lid,
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 around the outer periphery of the injection hole. An outer ring valve seat, which is concentric with the inner ring valve seat and is flush with the inner ring seat, is formed, and a single discharge hole is opened from the annular groove to connect the variable pressure chamber to the outlet. A disc-type steam trap in which a disc-shaped valve disc that is seated on and off is arranged in a variable pressure chamber, and a protrusion protruding downward is formed around the inner surface of the upper wall of the lid.