JP2876273B2 - 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 steel for automatically discharging condensate generated in a steam piping system by opening and closing a valve disk in response to a pressure change in a variable pressure chamber, that is, a thermodynamic steam chamber. And, more particularly, to a trap having a screen for capturing foreign matter such as dust.

The basic structure of a disk-type steam trap is that a transformation chamber is formed inside a body and a lid, and an ejection hole is opened at the center of the transformation chamber side end of the body to communicate the inlet with the transformation chamber. An annular groove is provided around the outer periphery of the ejection hole, an inner ring valve seat is formed between the ejection hole and the annular groove, and an outer ring valve seat is formed around the outer periphery of the annular groove. And a valve disk that 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 the variable pressure chamber. If foreign matter such as dust adheres to the valve disk or valve seat surface, there is no problem if the foreign matter is fine, but if the foreign matter is large, there is a problem that the valve cannot be completely closed and steam leaks. Therefore, a screen having a large number of strain holes is provided on the entrance side so as to catch foreign matters larger than the strain holes.

[0003]

2. Description of the Related Art An example of this is disclosed in Japanese Patent Application Laid-Open No. 1-234697. In this method, an inflow passage extending obliquely downward from the inlet is provided between the inlet and the ejection hole, and a cylindrical screen is disposed in the inflow passage.

[0004]

In the above-mentioned conventional apparatus, the trapped holes in the screen are clogged by the caught foreign matter, so that the trap must be disassembled and cleaned frequently, which is troublesome. was there. Therefore, a technical object of the present invention is to enable a foreign substance trapped in a screen hole of a screen to be automatically removed.

[0005]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to form a transformer chamber inside the main body and the lid, and to form an end of the main body on the transformer chamber side end. A vent hole is opened at the center to communicate the inlet and the variable pressure chamber, an annular groove is provided around the outer periphery of the vent hole, an inner ring valve seat is provided between the ejector hole and the annular groove, and an outer ring valve seat is located around the outer periphery of the annular groove. A desk-type steam trap in which a discharge disk is formed, an exhaust hole is opened from the annular groove, the variable pressure chamber communicates with the outlet, and a valve disk that is separated from and seated on the valve seat surface composed of the inner ring valve seat and the outer ring valve seat is disposed in the variable pressure chamber. Wherein an inlet passage extending obliquely downward from the inlet is provided between the inlet and the outlet, and a cylindrical screen is arranged in the inlet passage. It is characterized in that it is arranged in a housing.

[0006]

The operation of the above technical means is as follows.
Immediately after the valve disc is seated on the valve seat, the portion from the inlet to the outlet through the inflow passage is a steam region,
The float sinks below the screen. When condensed water accumulates in the area from the inlet to the vent, the float floats up and reaches the top of the screen. Thereafter, by opening the valve disk, the float is displaced to the lower portion of the screen by the momentum of the condensate flowing from the inlet to the outlet. Thus, every time the valve disc is opened and closed, the float is screened.
By displacing the inside of the screen and rubbing against the screen when the screen is displaced, the foreign matter trapped in the strainer hole can be crushed or washed away.

[0007]

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. By forming an inflow passage 6 obliquely downward from the inlet 4 and extending upward from the inflow passage 6 to form an ejection hole 7 substantially at the center of the main body 1, the inlet 4 communicates with the variable pressure chamber 3. A cylindrical screen 8 having a number of strain holes is arranged in the inflow passage 6. The screen 8 is fixed with its upper surface against the wall of the main body 1 and its lower surface against the upper surface of the plug 9 screwed to the main body 1. The spherical float 10 is placed in the screen 8. Float 10
Is formed slightly smaller than the inner diameter of the screen 8 so that the screen 8 comes into sliding contact with the screen 8 loosely. A plurality of projections 11 are provided on a screen 8 so that a float 10
The flow path from the to the inflow passage 6 is not blocked.

[0008] An annular groove 12 is formed around the outside of the ejection hole 7,
An annular inner ring valve seat 13 is formed between the ejection hole 7 and the annular groove 12, and an annular outer ring valve seat 14 is formed around the outer periphery of the annular groove 12. The inner ring valve seat 13 and the outer ring valve seat 14 are concentric and formed on the same plane. A discharge hole 15 is opened from the annular groove 12 to make the transformer chamber 3 communicate with the outlet 5. A disc-shaped valve disk 16 that is detachably seated on the inner and outer ring valve seats 13 and 14 and that opens and closes is disposed in the variable pressure chamber 3. A cap 17 is placed on the outside of the lid 2 to form an air-warming chamber 18.

The operation of the above embodiment will be described. The float 10 submerging at the lower part of the screen 8 rises to reach the upper part of the screen 8 as indicated by a two-dot chain line due to the condensed water accumulated in the inflow passage 6. Then the valve disc 16
When the valve is opened, the float 10 is displaced to the lower part of the screen 8 by the momentum of the condensate flowing from the inlet 4 to the jet hole 7. When the float 10 is displaced in the screen 8 and rubs against the screen 8, the float 10 crushes and removes the foreign matter trapped in the strainer hole.

[0010]

As described above, according to the present invention, the screen
Since the foreign matter caught in the hole can be automatically wiped off, there is no need to disassemble, and maintenance and management become easy.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Transformation chamber 4 Inlet 5 Outlet 6 Inflow passage 7 Outlet 8 Screen 10 Float 12 Annular groove 13 Inner ring valve seat 14 Outer ring valve seat 15 Discharge hole 16 Valve disk

Claims (1)

(57) [Claims] 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 around the periphery, a discharge hole is opened from the annular groove, the variable pressure chamber is connected to the outlet, and a valve disk that separates and seats on the valve seat surface consisting of the inner ring valve seat and the outer ring valve seat is arranged in the variable pressure chamber A desk-type steam trap having an inflow passage extending obliquely downward from the inlet between the inlet and the ejection hole, and having a cylindrical screen disposed in the inflow passage, which is displaced by the discharge fluid. A disk type steam trap having a float arranged in a screen.