JPH06241392A - Steam trap device - Google Patents

Abstract

PURPOSE:To sufficiently develop the gas/water separating function by increasing the sealing function of a gasket. CONSTITUTION:A valve element 31 is press-attached on the flat surface of a valve casing 33 through a gasket 37. By installing the valve element 31 in a rotatable manner, the primary side introducing passage 20 and the secondary side passage 23 are connected together or cut off through a steam trap 10 or without using the steam trap 10. Three passages 21-23 opened on the flat surface of the valve casing 33 are arranged on an arc having the revolution center of the valve element 31 as the center. Further, the through hole 34 of the valve element 31 is opposed to the cut hole 37d of the gasket 37, in the stop state where fluid does not flow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap device in which a steam trap for separating condensed water from steam is separated from a steam trap.

[0002]

2. Description of the Related Art In a steam trap device provided with a bypass, the primary side is connected to a secondary side via a steam trap, and the primary side is connected to a secondary side without a steam trap. The bypass state and the stop state in which the primary side is shut off from the secondary side can be selected. In this type of steam trap device,
A switch valve is incorporated in the steam trap to reduce the size of the device (see, for example, Japanese Utility Model Publication No. 63-57897 and Japanese Utility Model Publication No. 2-135798). An example thereof is shown in FIG.

In FIG. 9 (a), a steam trap 1
The fluid L such as steam and condensate flows into the chamber 12 of 0 from the inlet side 12a through the strainer 13. The chamber 12 accommodates a bellows 14 that expands and contracts according to temperature changes, and a trap valve body 15 at the tip of the bellows 14 opens and closes an outflow hole 16.

An inlet side passage 21 communicates with the inlet side 12a of the chamber 12, while an outlet side passage 22 communicates with the outlet side 12b of the chamber 12. Primary side introduction path 20
Communicates with the valve chamber 32 that houses the valve element 31 of the switching valve 30 shown in FIG. 9B, and the secondary outlet passage 24 is the secondary passage 2
It communicates with 3. The primary side introduction passage 20, the inlet side passage 21, the outlet side passage 22, the secondary side passage 23, and the secondary side introduction passage 24 are formed in the valve box 33 of the switching valve 30 by drilling. The inlet-side passage 21, the outlet-side passage 22 and the secondary-side passage 23 are open on a flat inner surface of the valve box 33 and are arranged in a straight line.

The valve body 31 has openings 21a, 22 for the inlet side passage 21, the outlet side passage 22 and the secondary side passage 23.
through holes 34 and U having openings matching a and 23a
A letter-shaped communication hole 35 is formed. This valve body 31
Due to the spring force of the spring 36, it is pressed against the flat surface of the valve box 33 via a plate-shaped gasket 37. In addition, 38 is a bush. The valve body 31 is rotatable, so that the steam trap device can selectively switch the trap operating state, the bypass state or the stop state.

Next, the steam trap 1 shown in FIG.
The action of 0 will be briefly described. First, when high temperature steam is introduced into the chamber 12 through the inlet side passage 21, the bellows 1
The temperature of 4 rises and the bellows 14 expands. As a result, the trap valve body 15 closes the outflow hole 16, the outlet side passage 22 is closed, and the discharge of steam is blocked. After that, when the condensate stays in the inner chamber 12, the temperature of the bellows 14 decreases and the bellows 14 contracts. As a result, the trap valve body 15 opens the outflow hole 16, and the outlet side passage 2
Condensate is discharged from 2.

As described above, since the steam trap device separates air and water, in order to improve the certainty of this water and water separation, the seal between the valve and the contact portion such as the valve seat and the gasket 37 is increased. It is necessary to improve the sex. Therefore,
As described above, this conventional technique is based on the spring 36 of FIG.
Of the gasket 37 by pressing the valve body 31 against the flat surface of the valve box 33 through the gasket 37 by the spring force of
Even if it wears, the sealing property does not deteriorate.

[0008]

However, in the above-mentioned prior art, since the inlet side passage 21, the outlet side passage 22 and the secondary side passage 23 are arranged in a straight line, the width of the gasket 37 required for the sealing. When W is secured, the area of the gasket 37 increases. Therefore, the sealing pressure (contact pressure) of the gasket 37 is reduced, and therefore the sealing ability may be reduced. As a result, it may not be possible to separate water and water sufficiently.

In the stopped state where the valve body 31 is rotated by 90 °, the through hole 34 of the valve body 31 is closed. At this time, the through hole 34 faces the gasket 37. Thus, when the through hole 34 faces the gasket 37, the pressure of the fluid is applied to the gasket 37. Therefore, the gasket 37 may be bent, and thus the sealing ability may be reduced. As a result, again, there is a possibility that air and water cannot be sufficiently separated.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a steam trap device which can enhance the sealing ability of a gasket and can sufficiently exhibit the function of separating water and water.

[0011]

In order to achieve the above object, the invention of claim 1 is such that the openings of the inlet side passage, the outlet side passage and the secondary side passage formed in the valve box are the rotation centers of the valve body. Are arranged on an arc centered at. On the other hand, in the invention of claim 2, the gasket is cut out at the position where the through hole formed in the valve body is closed.

[0012]

According to the invention of claim 1, since the openings of the three passages are arranged in a circular arc, the area of the gasket can be reduced. Therefore, the sealing pressure becomes high. On the other hand, according to the second aspect of the invention, since the gasket is cut out at the position where the through hole is closed, the pressure of the fluid does not act on the gasket in the stop state, so that the bending of the gasket is prevented. obtain.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 (a), this steam trap device has the same basic function as that of the conventional example of FIG. 9 or a second embodiment described later, and in the following description, the parts different from the conventional example will be mainly described. The same parts or corresponding parts are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 2, the valve box 33 has a blind hole 25 in addition to the inlet side passage 21, the outlet side passage 22 and the secondary side passage 23. The three passages 21,
22 and 23 and openings 21a, 22a and 23 of the blind hole 25
a and 25a are circular, and as clearly shown in FIG.
The valve bodies 31 (FIG. 1B) are arranged at 90 ° pitch on an arc centered on the rotation center 31a. On the other hand, in the gasket 37, the four openings 21a, 22a, 23
Circular notch holes 37a, 37b, 37c and 37d are formed at positions corresponding to a and 25a, respectively. In addition, 36A of FIG.1 (a) is a wave washer.

As shown in FIGS. 1B and 3, the valve body 31
Circular opening 34 of through hole 34 and communication hole 35 of
a, 35a and 35b are openings 21a to 23 of the three passages 21 to 23, respectively, in the trap operating state.
It matches a. In the stop state of FIG. 4, the through hole 34 faces the blind hole 25, and the communication hole 35 communicates with the inlet side passage 21 and the outlet side passage 22. Therefore, even in the portion of the valve body 31 where the through hole 34 is closed, the gasket 37 is notched and the notch hole 37d is formed as shown in FIG. In the bypass state of FIG. 5, the through hole 34 communicates with the secondary passage 23,
The openings 35a and 35b of the communication hole 35 face the inlet-side passage 21 and the blind hole 25. As shown in FIG. 6, the steam trap 10 is communicated with a residual pressure removing valve 40.

Next, the operation of the above configuration will be described. In the trap operating state of FIG. 3, the fluid L from the primary-side introduction passage 20 is introduced into the steam trap 10 through the through hole 34 and the inlet-side passage 21, and then the outlet-side passage 22, the communication hole 35 and the secondary passage 35. Through the secondary passage 23,
It is led out from the secondary side lead-out path 24.

When the valve body 31 is rotated clockwise by 90 °, the stop state shown in FIG. 4 is obtained. In this stop state, the through hole 34 faces the blind hole 25, while the secondary passage 23 is closed by the valve body 31. Therefore, since the fluid L does not flow into the steam trap 10, the steam trap 10 can be maintained.

When the valve body 31 shown in FIG. 4 is further rotated clockwise by 90 °, the bypass state shown in FIG. 5 is established. In this bypass state, the fluid L from the primary-side introduction passage 20 passes through the through hole 34.
Since the fluid L is discharged to the secondary introduction path 24 via the secondary passage 23, the fluid L is discharged from the primary side to the secondary side without passing through the steam trap 10.

In the steam trap device having the above structure, the openings 21a to 23a of the three passages 21 to 23 formed in the valve box 33 are arranged in an arc as shown in FIG. 1 (c). So gasket 3 required for sealing
It is possible to reduce the diameter of the gasket 37 while securing the width W of 7. Therefore, since the sealing pressure of the gasket 37 is increased, the sealing performance is improved.
Sufficient air / water separation can be performed.

Further, in the stop state of FIG. 4, since the through hole 34 faces the notch hole 37d of the gasket 37, the pressure of the fluid L does not act on the gasket 37. Therefore, since there is no possibility that the gasket 37 will be bent by the pressure of the fluid L, the sealing ability of the gasket 37 does not decrease, and thus, sufficient steam separation can be performed.

By the way, in this type of device, in order to remove the residual pressure of the steam trap 10 when performing maintenance of the steam trap 10, as shown in FIG.
A residual pressure removing valve 40 is provided. Further, in the bypass state of FIG. 7C, since the high temperature fluid L is flowing, it is not preferable to perform maintenance, and FIG.
It is preferable to perform maintenance in the stop state.

Here, when the passage communicating with the steam trap 10 constitutes a closed circuit as shown in FIG. 7C in the stop state of FIG. 7B, the steam trap 10 exists. , Residual pressure relief valve 40 (see FIG.
It takes time to remove the residual pressure from (a), and maintenance work cannot be performed quickly. In contrast,
In this embodiment, in the stop state of FIG. 4, the inlet side passage 21 and the outlet side passage 22 communicate with each other through the communication hole 35, so as shown in FIG. A closed circuit including is constructed. Therefore, the residual pressure in the upstream and downstream passages of the steam trap 10 can be immediately removed from the residual pressure removal valve 40, and thus the maintenance can be performed quickly.

FIG. 8 shows a second embodiment. In FIG. 8A, in the second embodiment, the primary side introducing passage 20 has the valve box 3
3, the primary side inlet passage 20 and the secondary side outlet passage 24 are arranged on a straight line. Figure 8 (b)
In the above, the steam trap 10 includes a diaphragm-type valve 15 </ b> A inside the chamber 12. The valve 15A closes the outflow hole 16 when a liquid such as alcohol (not shown) expands due to heat. Other configurations are similar to those of the above-described first embodiment, and the same portions or corresponding portions will be denoted by the same reference numerals and the description thereof will be omitted.

In the present invention, the communication hole 3 shown in FIG.
5 is not limited to a substantially U-shaped shape, and has a function of selectively communicating any two of the three passages 21 to 23 and the blind hole 25 with each other at the bottoms of the circular openings 35a and 35b. As long as it has, and may be, for example, V-shaped.

[0025]

As described above, according to the invention of claim 1, since the gasket area can be reduced, the sealing pressure of the gasket is increased, and the sealing ability is improved. As a result, the steam is improved. The air-water separation function of the trap device as a whole is improved.

On the other hand, according to the second aspect of the present invention, since it is possible to prevent the gasket from bending, the gasket sealing ability is improved, and similarly, the gas-water separation function as a whole is improved.

[Brief description of drawings]

FIG. 1 (a) is a schematic configuration diagram of a steam trap device showing a first embodiment of the present invention, and FIG. 1 (b) is a diagram of FIG. 1 (a).
Sectional drawing of the valve body in the b-1b line, (c) is FIG. 1 (a)
FIG. 1C is a cross-sectional view of the gasket taken along the line 1c-1c.

FIG. 2 is an exploded perspective view of a switching valve showing a main part of the present invention.

FIG. 3 is a perspective view showing a cutaway part of a switching valve in a trap operating state.

FIG. 4 is a perspective view showing a cutaway part of a switching valve in a stopped state.

FIG. 5 is a perspective view showing a cutaway part of the switching valve in a bypass state.

FIG. 6 is a circuit diagram showing an arrangement state of a residual pressure removing valve.

FIG. 7 is a chart showing valve positions and circuits in each state.

8A is a sectional view of a steam trap device showing a second embodiment, and FIG. 8B is a sectional view taken along line 8b-8b of FIG. 8A.

9A is a cross-sectional view showing a conventional example, FIG. 9A is a cross-sectional view taken along line 9a-9a of FIG. 9B, and FIG. 9B is 9b-9b of FIG. 9A.
It is a line sectional view.

[Explanation of symbols]

10 ... Steam trap, 20 ... Primary side introduction path, 21 ...
Entrance side passage, 22 ... Exit side passage, 23 ... Secondary side passage, 2
1a to 23a ... Opening, 31 ... Valve body, 31a ... Rotation center,
32 ... Valve chamber, 33 ... Valve box, 34 ... Through hole, 35 ... Communication hole, 34a, 35a, 35b ... Opening, 37 ... Gasket, 37d ... Notch hole.

Claims (2)

[Claims] 1. A valve box having an inlet-side passage communicating with an inlet side of a steam trap, an outlet-side passage communicating with an outlet side of the steam trap, and a secondary-side passage communicating with a secondary side of a steam pipe. A through hole having three passages of the valve box opened to a flat inner surface of the valve box, a through hole having circular openings matching these openings, and a communication hole for connecting the remaining two through at the bottom of the circular opening. The valve body formed with is pressed against a flat surface of the valve box via a gasket, and by rotatably providing the valve body, a primary side passage communicating with a valve chamber accommodating the valve body, and In the steam trap device, which is connected to the secondary side passage with or without a steam trap, or is blocked from each other, the openings of the three passages of the valve box are centered on the rotation center of the valve body. That it is placed on an arc Steam trap apparatus according to symptoms. 2. A valve box having an inlet-side passage communicating with an inlet side of a steam trap, an outlet-side passage communicating with an outlet side of the steam trap, and a secondary-side passage communicating with a secondary side of a steam pipe. A through hole having three passages of the valve box opened to a flat inner surface of the valve box, a through hole having circular openings matching these openings, and a communication hole for connecting the remaining two through at the bottom of the circular opening. The valve body formed with is pressed against a flat surface of the valve box via a gasket, and by rotatably providing the valve body, a primary side passage communicating with a valve chamber accommodating the valve body, and In the steam trap device, in which the secondary passage and the secondary passage are connected via a steam trap or not, or are cut off from each other, in the portion where the through hole of the valve body is closed, the gasket is notched. Being done Steam trap apparatus according to symptoms.