JPH07139694A - Thermoresponsive type steam trap - Google Patents

Abstract

PURPOSE:To enlarge a space between a valve member and a valve seat member at the time of opening a valve and to discharge a large quantity of low temperature fluid by arranging a plural number of temperature control machine elements in the axial direction of an efferent path and forming a valve part for opening/closing the efferent path on the temperature control machine elements placed opposed thereto. CONSTITUTION:An entrance 4, a valve chamber 3 and an exit 5 are formed in a valve casing. A valve seat member 6 having an efferent path 7 is arranged between the valve chamber 3 and the exit 5. Diagrams 14a and 14b whose outer peripheral edges are fixed on wall members 11a and 11b are provided and temperature control machine elements 8 and 9 including expanding media 15a and 15b enclosed between the wall members 11a and 11b and the diagrams 14a and 14b are located in the valve chamber 3. The temperature control machine elements 8 and 9 are arranged plurally in the axial direction of the efferent path 7. Further, a valve part 18 for opening/closing the efferent path 7 is formed on the temperature control mahine elements 8 and 9 placed opposed to the efferent path 7 and an elastic member 19 for energizing the temperature control machine elements 8 and 9 in the opening direction of the valve is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap that automatically discharges condensate generated in various steam-using devices and steam pipes, and in particular, it is heated and cooled by steam and condensate and expands according to its temperature. The present invention relates to a heat-actuated steam trap that discharges condensed water below a desired temperature to the outside of a system by using a temperature control element containing a contracting medium.

[0002]

2. Description of the Related Art The basic structure of a heat-actuated 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 dish-shaped wall members, the expansion medium is enclosed 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 placed in the valve chamber that communicates with the inlet, and the expansion / contraction of the expansion medium is used to drive the valve member through the diaphragm, and thereby the discharge path that communicates the valve chamber with the outlet. The valve seat member having the above-mentioned structure allows the valve member to be seated on and off.

When a high temperature fluid having a temperature higher than a predetermined temperature flows into the valve chamber, the expansion medium expands to displace the diaphragm in the valve closing direction so that the valve member is seated on the valve seat member and the outlet passage is closed. This prevents the discharge of steam. When a low-temperature fluid below a predetermined temperature flows in, the expansion medium contracts, the fluid pressure in the valve chamber causes the diaphragm to be displaced in the valve opening direction, the valve member separates from the valve seat member, and the lead-out path is opened. . As a result, condensed water and air are discharged outside the system.

[0004]

However, in the heat-actuated steam trap of this type, the displacement of the diaphragm due to the expansion and contraction of the expansion medium is limited. There is a problem that it takes a long time to discharge a large amount of low temperature fluid due to a narrow gap with the valve seat member.

Therefore, a technical object of the present invention is to obtain a heat-acting steam trap which can quickly discharge a large amount of low temperature fluid by increasing the gap between the valve member and the valve seat member when the valve is opened.

[0006]

The technical means of the present invention taken to solve the above-mentioned technical problem is a valve seat having an inlet, a valve chamber and an outlet formed by a valve casing and having a discharge passage. A member is disposed between the valve chamber and the outlet, and a temperature control element including a wall member, a diaphragm having an outer peripheral edge fixed to the wall member, and an expansion medium enclosed between the wall member and the diaphragm is provided in the valve chamber. In the heat-actuated steam trap, the temperature control elements are arranged side by side in the axial direction of the derivation path, and a valve part for opening and closing the derivation path is formed on the temperature control element facing the derivation path. An elastic member for urging the temperature control element in the valve opening direction is provided.

[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 derivation path, the total displacement of each diaphragm due to expansion and contraction of each expansion medium is formed in the part facing the derivation path of the temperature control element. It is the displacement of the valve part with respect to the lead-out 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 discharged quickly.

[0008]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIGS. 1 and 2). A valve case having a valve chamber 3 inside by screwing the upper casing 1 and the lower casing 2 together.
Thing is formed. An inlet 4 is formed in the upper casing 1 and an outlet 5 is formed in the lower casing 2. A valve seat member 6 is screwed between the valve chamber 3 and the outlet 5. A through passage 7 is formed in the center of the valve seat member 6 to connect the valve chamber 3 and the outlet 5.

Above the valve seat member 6 are located two temperature control elements 8 and 9 arranged side by side vertically. The temperature control elements 8 and 9 are wall members 11 having inlets 10a and 10b, respectively.
a, b and a plug member 12a for sealing the inlets 10a, 10b,
b, the diaphragms 14a, b forming the storage chambers 13a, 13b between the wall members 11a, b, the expansion media 15a, b sealed in the storage chambers 13a, 13b, and the diaphragms 14a, 14b.
It is composed of connecting members 16a, b fixed to the center of b, and fixed wall members 17a, b for fixing the outer peripheral edges of the diaphragms 14a, b between the wall members 11a, b. The lower surface of the plug member 12b of the temperature control element 9 on the lower side forms a valve portion 18 for seating on and off 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, and the upper temperature control element 8 is urged.
The outer periphery of the upper surface of the wall member 11a is held against the lower surfaces of a plurality of ribs 20 formed on the inner periphery of the upper casing 1. The outer circumferences of the temperature control elements 8 and 9 are vertically guided 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, the expansion media 15a and 15b contract, and the diaphragms 14a and 14b are displaced toward the wall members 11a and 11b, respectively, as shown in FIG. . 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 lead-out path 7.

When the temperature of the fluid flowing into the valve chamber 3 rises due to the discharge of the low temperature fluid, the expansion media 15a and 15b are expanded and the diaphragm 14 is expanded, 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. Close Road 7.

Although two temperature control elements are arranged in the above embodiment, it is also possible to arrange three or more temperature control elements. Further, although the fixed wall members are faced to each other, the wall members may be faced to each other or the wall member and the fixed wall member may be faced to each other.

[0014]

The present invention produces the following unique effects. As described above, the heat-actuated steam trap according to the present invention is
Since a sufficient discharge passage 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 thermally responsive steam trap can be obtained.

[Brief description of drawings]

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

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

[Explanation of symbols]

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

Claims (1)

[Claims] 1. A valve casing forms an inlet, a valve chamber, and an outlet, and a valve seat member having a lead-out path is arranged between the valve chamber and the outlet, and a wall member and an outer peripheral edge are fixed to the wall member. A temperature control element consisting of a diaphragm and an expansion medium enclosed between the wall member and the diaphragm is arranged in the valve chamber, and a plurality of temperature control elements are arranged side by side in the axial direction of the discharge path. A thermo-responsive type steam generator characterized in that a temperature control element facing the path is formed with a valve portion for opening and closing the outlet path, and an elastic member for urging the temperature control element in the valve opening direction is provided.
Mutrap.