JP2711608B2 - 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 for automatically discharging condensate generated in a steam piping system, and particularly to a valve seat surface of inner and outer ring valve seats and foreign matters such as scales. The present invention relates to a device that can be reused even if it cannot be closed due to the adhesion of the material.

[0002]

2. Description of the Related Art Conventional disk type steam traps are:
An inner and outer ring valve in which a valve seat member forming a variable pressure chamber is disposed between a valve casing and a valve casing having an inlet and an outlet, and the inlet and the outlet communicate with an opening end of the valve seat member on the side of the variable pressure chamber. A valve seat is formed in the variable pressure chamber, and a valve disk that is separated from and seated on the valve seat surface of the inner and outer ring valve seats is arranged in the variable pressure chamber. The condensate is automatically discharged by taking off and sitting on the surface.

[0003]

DISCLOSURE OF THE INVENTION In a disk type steam trap, since the valve disk is impacted on and off the valve seat surface of the inner and outer ring valve seats, the valve seat surface of the inner and outer ring valve seats can be relatively quickly mounted. There is a problem that it cannot be closed due to abrasion or adhesion of foreign matter such as scale in the fluid. When wear or foreign matter adheres to the valve seat surface of the inner and outer ring valve seats, the valve casing is disassembled and the valve seat member is replaced, but it is uneconomical to dispose it only once. And it had to be disassembled for replacement, which was troublesome. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a disc-type steam trap which can be reused without disassembling even if the valve seat surfaces of the inner and outer ring valve seats cannot be closed due to wear or adhesion of foreign matter.

[0004]

In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a variable pressure chamber between a valve casing having an inlet and an outlet. A spherical valve seat member is formed, and a valve seat surface comprising an inner and outer ring valve seats with which an inlet and an outlet communicate with each other is formed on the variable pressure chamber side opening end of the spherical valve seat member. Positioning the valve disc to be detached and seated in the variable pressure chamber, arranging the polishing member facing the spherical valve seat member, and positioning the valve seat surface composed of the inner and outer ring valve seats formed on the spherical valve seat member to face the valve disc. A valve shaft for rotating to a position facing the polishing member is connected to a spherical valve seat member, and a rotating member for bringing the polishing member into contact with the spherical valve seat member and rotating the polishing member is connected to the polishing member.

[0005]

The operation of the above technical means is as follows.
When the valve seat surfaces of the inner and outer ring valve seats cannot be closed due to wear or adhesion of foreign matter, first, the valve shaft connected to the spherical valve seat member is operated, and the valve seats of the inner and outer ring valve seats formed on the spherical valve seat member are operated. The surface is rotated to a position facing the polishing member. Next, the rotating member connected to the polishing member is operated to bring the polishing member into contact with the spherical valve seat member and rotate the same, whereby the valve seat surfaces of the inner and outer ring valve seats can be polished.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). A lid 2 and a lid 3 are screwed to the main body 1 to form a valve casing. An inlet 4 and an outlet 5 are formed on the main body 1 on the same axis. The spherical valve seat member 6 is disposed in a substantially cylindrical space formed in the valve casing. Annular seal members 7 and 8 are arranged on the inlet 4 side and the outlet 5 side of the spherical valve seat member 6, and a variable pressure chamber 10 is formed between the spherical valve seat member 6 and the lids 2 and 3.

An inflow hole 11 is formed in the spherical valve seat member 6 to communicate the inlet 4 with the variable pressure chamber 10. An annular groove 12 is provided around the inflow hole 11, and the variable pressure chamber 10 communicates with the outlet 5 through the annular groove 12 and the outflow hole 13. An inner ring valve seat 14 is formed between the inflow hole 11 and the annular groove 12, and an outer ring valve seat 15 is formed outside the annular groove 12. The inner ring valve seat 14 and the outer ring valve seat 15 are concentric and their upper surfaces form a flush valve seat surface. A valve disc 16 is disposed in the variable pressure chamber 10 to be seated on the inner ring valve seat 14 and the outer ring valve seat 15 to open and close the inflow hole 11 and the annular groove 12 and to communicate or block the inlet 4 and the outlet 5.

A grindstone 17 as a polishing member is disposed between the lid 3 and the spherical valve seat member 6. The rotating member 18 disposed through the lid 3 is connected to the polishing member 1 via the connecting member 19.
Fix to 7. The rotating member 18 is rotatably held by a holder 20 screwed to the lid 3. A rotating handle 21 is attached to the rotating member 18, and a nut 22 prevents the handle from slipping out. The rotating member 18 is urged downward by a spring 23 disposed between the holder 20 and the handle 21.

A recess is formed in the spherical valve seat member 6 on the side opposite to the portion where the inner and outer ring valve seats 14 and 15 are formed, and a grindstone 24 as a polishing member for polishing a valve disk is attached with an adhesive. A rotating member 25 for the valve disk is disposed through the lid 2. The rotating member 25 is rotatably held by a holder 26 screwed to the lid 2. A rotating operation handle 27 is attached to the rotating member 25, and a nut 28 prevents the handle from coming off. Spring 29 disposed between holder 26 and handle 27
Urges the rotating member 25 upward. The lower end of the rotating member 25 fits into a concave portion 30 formed on the upper surface of the valve disk 16 so that the valve disk 16 can be rotated.

[0010] As shown in FIG.
1 is provided, and the valve shaft 32 penetrating the main body 1 is engaged.
The valve shaft 32 is fixed to the main body 1 with the holder 33 screwed to the main body 1.
To be rotatable. A handle 34 is attached to the valve shaft 32 so that the spherical valve seat member 6 can be rotated from the outside.

When the valve seat surfaces of the inner and outer ring valve seats 14 and 15 of the spherical valve seat member 6 cannot be closed due to wear or adhesion of foreign matter, first, as shown in FIG.
Is operated to rotate the spherical valve seat member 180 by 180 degrees, so that the valve seat surfaces of the inner and outer ring valve seats 14 and 15 face the polishing member 17. Next, the polishing member 17 is brought into contact with the spherical valve seat member 6 by pushing the handle 21 against the spring 23, and the rotating member 18 is rotated by operating the handle 21 to perform polishing. When the valve disk 16 is polished in the same manner, with the valve disk polishing member 24 facing the valve disk 16, the handle 27 is pushed in against the spring 29 to push the tip of the rotating member 25 to the valve disk 16. Recess 30
And the handle 27 is operated to rotate the rotating member 25.

[0012]

The present invention has the following specific effects. According to the present invention as described above, by operating the valve shaft and the rotating member, the valve seat surface of the valve seat member can be polished again without disassembling the valve casing. A reusable disk-type steam trap can be obtained.

[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.

FIG. 2 is a central longitudinal sectional view of FIG. 1 showing a state in which the spherical valve seat member of FIG. 1 is being rotated by 180 degrees and polished.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2, 3 Lid 4 Inlet 5 Outlet 6 Spherical valve seat member 10 Transformation chamber 14 Inner ring valve seat 15 Outer ring valve seat 16 Valve disk 17 Polishing member 18 Rotating member 32 Valve shaft

Claims (1)

(57) [Claims] A spherical valve seat member forming a variable pressure chamber between a valve casing and a valve casing having an inlet and an outlet is disposed at an opening end of the spherical valve seat member on the variable pressure chamber side. Forming a valve seat surface composed of an inner and outer ring valve seat with which the outlet communicates, disposing a valve disc which is detached and seated on the valve seat surface of the inner and outer ring valve seat in the variable pressure chamber;
A valve shaft having an abrasive member disposed facing the spherical valve seat member and rotating the valve seat surface formed of the inner and outer ring valve seats formed on the spherical valve seat member between a position facing the valve disc and a position facing the polishing member; A disc-shaped steam trap in which a rotating member for connecting the polishing member to the spherical valve seat member and rotating the polishing member is connected to the polishing member.