JP2952393B2 - Thermo-responsive 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 steam trap for automatically discharging condensate generated in various steam-using equipment and steam pipes, and more particularly, to a steam trap which is heated and cooled by steam and condensate and expanded according to the temperature. The present invention relates to a thermo-responsive steam trap for discharging condensate below a desired temperature out of the system by using a temperature control element containing a contracting medium.

[0002]

2. Description of the Related Art The basic structure of a thermally responsive steam trap is known, for example, from Japanese Patent Publication No. 60-46318. As understood from the publication, the outer peripheral edge of the diaphragm is fixed between the upper and lower two dish-shaped wall members, the expansion medium is sealed in the internal space between the upper wall member and the diaphragm, and the valve member is connected to the diaphragm. The temperature control element is disposed in the valve chamber communicating with the inlet, and the valve member is driven through the diaphragm by utilizing the expansion and contraction of the expansion medium, thereby connecting the outlet with the valve chamber. The valve member is adapted to be detached and seated on the valve seat member having the above.

When a high-temperature fluid having a predetermined temperature or more flows into the valve chamber, the expansion medium expands, displacing the diaphragm in the valve closing direction, seating the valve member on the valve seat member, and closing the outlet passage. This prevents the discharge of steam. When a low-temperature fluid having a predetermined temperature or less flows, the expansion medium contracts, and the diaphragm is displaced in the valve opening direction by the fluid pressure in the valve chamber, so that the valve member is separated from the valve seat member and the outlet path is opened. . As a result, condensate and air are discharged out of the system.

[0004]

However, in such a thermo-responsive steam trap of this type, the displacement of the diaphragm due to the expansion and contraction of the expansion medium is limited, so that the valve member and the valve member at the time of valve opening are limited. There is a problem that the clearance between the valve seat member and the valve seat member is narrow, and it takes time to discharge a large amount of low-temperature fluid.

Accordingly, it is an object of the present invention to provide a thermally responsive steam trap capable of rapidly discharging a large amount of low-temperature fluid by increasing a gap between a valve member and a valve seat member when the valve is opened.

[0006]

In order to solve the above-mentioned technical problems, the technical means of the present invention is to provide a valve seat having an inlet, a valve chamber, and an outlet formed by valve casing and having an outlet path. A temperature control element comprising a wall member, a diaphragm having an outer peripheral edge fixed to the wall member, and an expansion medium sealed between the wall member and the diaphragm; in those disposed, side by side a plurality arranged temperature control machine element in the axial direction of the outlet passage, the temperature controller element facing the outlet passage
To form a valve portion for opening and closing the outlet passage in the wall member, guide
It is characterized in that the wall member of the temperature controller element facing provided an elastic member for biasing in the valve opening direction to Detchi.

[0007]

The operation of the above technical means is as follows.
Since a plurality of temperature control elements are arranged side by side in the axial direction of the outlet path, the sum of the displacements of the respective diaphragms due to the expansion and contraction of each expansion medium is formed at the part facing the outlet path of the temperature control element. This is the displacement of the valve portion with respect to the outlet path.
Therefore, when the valve is opened, a sufficient discharge flow path can be formed between the valve member and the valve seat member, and a large amount of low-temperature fluid can be rapidly discharged.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). An upper casing 1 and a lower casing 2 are screwed together to form a valve casing having a valve chamber 3 therein.
Thing is formed. The upper case 1 has an inlet 4 and the lower case 2 has an outlet 5. A valve seat member 6 is screw-connected between the valve chamber 3 and the outlet 5. In the center of the valve seat member 6, a through-outflow path 7 that connects the valve chamber 3 and the outlet 5 is formed.

Above the valve seat member 6, two temperature control elements 8, 9 arranged vertically one above the other are located. The temperature control elements 8 and 9 are wall members 11 having inlets 10a and 10b, respectively.
a, b and a plug member 12a, which seals the inlets 10a, b.
b, diaphragms 14a, b forming storage chambers 13a, b between the wall members 11a, b, expansion media 15a, b sealed in the storage chambers 13a, b, and diaphragms 14a, b.
The connecting members 16a and 16b are fixed to the center of b, and the fixing wall members 17a and 17b are fixed to the outer peripheral edges of the diaphragms 14a and 14b between the wall members 11a and 11b. The lower surface of the plug member 12b of the lower temperature control element 9 forms a valve portion 18 which is detachably seated on the valve seat member 6 to open and close the outlet passage 7. Expansion medium 1
5a and 5b are formed of water, a liquid having a lower boiling point than water, or a mixture thereof.

The temperature control elements 8 and 9 are urged upward by a coil spring 19 as an elastic member disposed below the lower temperature control element 9, so that the upper temperature control element 8 is turned on.
The outer circumference of the upper surface of the wall member 11a is held against the lower surfaces of the plurality of ribs 20 formed on the inner circumference of the upper casing 1. The outer circumferences of the temperature control elements 8 and 9 are guided vertically by a plurality of ribs 21 formed on the inner circumference of the lower casing 2.

When the temperature of the fluid flowing into the valve chamber 3 is low, as shown in FIG. 1, the expansion media 15a and 15b contract, and the diaphragms 14a and 14b are displaced toward the wall members 11a and 11b, respectively. . The temperature control element 9 is lifted upward by the elastic force of the coil spring, and the valve portion 18 separates from the valve seat member 6 to open the outlet passage 7.

When the temperature of the fluid flowing into the valve chamber 3 increases due to the discharge of the low-temperature fluid, the expansion media 15a and 15b expand as shown in FIG.
a and b are displaced toward the fixed wall members 17a and 17b, respectively, the temperature control element 9 is displaced downward against the elastic force of the coil spring 19, and the valve portion 18 is seated on the valve seat member 6 and led out. Road 7 is closed.

In the above embodiment, two temperature control elements are arranged. However, it is of course possible to arrange three or more temperature control elements. Although the fixed wall members face each other, it is also possible to face the wall members together, or to face the wall member and the fixed wall member.

[0014]

The present invention has the following specific effects. As described above, the thermally responsive steam trap according to the present invention comprises:
Since a sufficient discharge channel can be formed between the valve portion and the valve seat member, a large amount of low-temperature fluid can be discharged quickly, and a large-capacity heat-responsive steam trap can be obtained . Ma
Also, the wall member of the temperature control element facing the outlet
To bias the valve in the valve opening direction.
Temperature controller without additional receiving member between elastic members
Element breakage can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an open state of a thermally responsive steam trap according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a closed state of the thermally responsive steam trap according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 3 valve chamber 4 inlet 5 outlet 6 valve seat member 7 outlet path 8, 9 temperature control element 11a, b wall member 14a, b diaphragm 15a, b expansion medium 18 valve section 19 coil spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16T 1/00-1/48

Claims (1)

(57) [Claims] An inlet, a valve chamber, and an outlet are formed by valve casing, a valve seat member having an outlet path is disposed between the valve chamber and the outlet, and an outer peripheral edge is fixed to the wall member and the wall member. In the valve chamber, a temperature control element composed of a diaphragm that has been made and an expansion medium sealed between the wall member and the diaphragm is arranged in the axial direction of the lead-out path. to form a valve portion for opening and closing the outlet passage in the wall member of the temperature controller element facing the road, the wall member of the temperature controller element that faces the outlet passage provided with a resilient member for biasing the valve opening direction A thermally responsive steam trap characterized by the following.