JPH08121646A - Valve with detection opening - Google Patents

Abstract

PURPOSE: To provide a valve with detection opening enabling not only gas pressure detection in the communicated state of the pipeline system of both pipeline end connections but also gas pressure detection only in the pipeline system of either one of the pipeline end connections. CONSTITUTION: A valve with a detection opening is provided with a body 1 having pipeline end connections 11, 12, a valve body 2 rotatably fitted and inserted in the body 1 and provided with a knob 21, and a nut 3 for fitting the valve body 2 to the body 1. The valve body 2 has an opening/closing part 20 for opening/closing the passage 10 of the body 1, and the opening/closing part 20 has a first passage part 20a, a second passage part, and a third passage part 20c. Gas pressure detection in the communicated state of the pipeline system of the pipeline end connections 11, 12, and gas pressure detection only in the pipeline system of the pipeline end connection 11 or 12 can thereby be switched by changing the position of the valve body 2 through the knob 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection port valve having a detection port for detecting gas pressure.

[0002]

2. Description of the Related Art As a valve with a detection port of this type, there is a ball valve as shown in FIG. 4, for example. This ball valve includes a pipe connection port 70 and a pipe connection port 71, to which pipes of a piping system are connected, and a rotatable ball that opens and closes a flow path that connects the pipe connection ports 70 and 71 (Fig. (Not shown), a detection port 72 communicating with the flow path depending on the position of the ball, and a knob 73 for operating the ball
Have and. A purge bolt (plug plug) 75 is screwed into the detection port 72 except when the gas pressure is detected.

In order to detect the gas pressure with this ball valve, first, as shown in FIG. 5 (a), a knob 73 is turned to form a flow path connecting the two pipe connection ports 70, 71 with a ball 74. The detection port 72 is turned off. Next, in this example, the purge bolt 75 is removed by the detection tool 77 whose tip also serves as a hexagon wrench [see (b) of FIG. 5], and then the detection tool 77 is attached to the detection port 72 [see (a) of FIG. 6]. Then turn the knob 73 to the ball 74
Is half-opened so that the flow path connecting the two pipe connection ports 70 and 71 and the detection port 72 are in communication with each other, and the gas pressure is detected [see (b) of FIG. 6]. After the detection, the knob 73 is turned to shut off the flow path and the detection port 72, and the purge bolt 75 is tightened to the detection port 72 to restore the original state.

[0004]

In the conventional ball valve described above, since the ball 74 is in a half-opened state at the time of detection, the detection port 72 is connected to the flow path that connects the pipe connection ports 70 and 71. Therefore, the gas pressure of the piping system connected to both piping connection ports 70 and 71 is detected. However, depending on the case, it is necessary to detect the gas pressure of the piping system on only one of the pipe connection port 70 side and the pipe connection port 71 side, and in such a case, there is a disadvantage that the ball valve cannot handle.

Therefore, the present invention has been made by paying attention to the above problems, and not only the gas pressure detection in the state where the piping systems of both the pipe connection ports communicate with each other, but also the piping of either one of the pipe connection ports It is an object of the present invention to provide a valve with a detection port that can detect gas pressure of only the system.

[0006]

In order to achieve the above-mentioned object, a valve with a detection port according to claim 1 of the present invention faces one and the other pipe connection port and a detection port for connecting a detection tool. A first flow path part having an opening, a second flow path part that opens to the side of the first flow path part, and the first flow path part, the second flow path part, and the detection port are in communication. A rotatable valve body having a third flow path portion and a knob for rotating the valve body are provided, and when the flow path communicating the both pipe connection ports is opened by the valve body, the first Of the second flow path portion is connected to both of the pipe connection ports and the second flow path portion is closed, and when the flow path is closed by the valve body, the first flow path portion is closed and the second flow path portion is closed. Is communicated with one or the other of the pipe connection ports.

[0007]

In this valve with a detection port, for example, a plug plug is attached to the detection port and the valve body is fully opened during normal times when the gas pressure is not detected. That is, in the fully opened state of the valve body, the first flow path portion of the valve body is in communication with both pipe connection ports and the second flow path portion is closed. In this state, the third flow passage communicating with the detection opening communicates with the first flow passage, but the detection opening is closed with a plug stopper, so that gas may leak from the detection opening. There is no.

To detect the gas pressure in this fully opened state, remove the plug of the detection port and attach the detection tool to the detection port so that the gas supply side of both pipe connection ports and the gas consumption side piping system communicate with each other. It is possible to detect the gas pressure in this state. On the other hand, when the gas pressure of only one of the pipe connection ports is detected, the knob is turned to fully close the valve body.
In the fully closed state of the valve body, the first flow path section is closed, but the second flow path section communicates with one or the other pipe connection port. Therefore, the detection port communicates with the pipe system of the one or the other pipe connection port through the second and third flow path portions. Therefore, if a detection tool is attached to the detection port, one of the pipe connection ports will be connected. The gas leak test can be performed by detecting the gas pressure of only the piping system of, that is, the piping system on the gas supply side or the gas consumption side.

[0009]

EXAMPLE A valve with a detection port of the present invention will be described below based on examples. FIG. 1 shows a cross-sectional view of a main part of a valve with a detection port according to the embodiment. The detection port valve includes a main body 1 having one pipe connection port 11 and the other pipe connection port 12, a shaft-shaped valve body 2 rotatably fitted in the main body 1 and having a knob 21, and a valve body. And a nut 3 for attaching 2 to the body 1.

Both pipe connection ports 11 and 12 of the main body 1 are the flow path 1
0, and female threads 11a and 12a are formed on both pipe connection ports 11 and 12, respectively.
For example, a gas supply side piping system is connected to one of 1 and 12 and a gas consumption side piping system is connected to the other by a pipe. This body 1
An opening for receiving the valve body 2 is formed near the center of the
The valve body 2 is rotatably fitted in the opening so as to be vertically rotatable in the axial direction of the main body 1. Further, one end opening of the valve body 2 (opening exposed from the knob 21) serves as a detection opening 22.

The nut 3 is screwed into a nut screwing portion 13 projecting around the opening of the main body 1 so that the valve body 2
Is rotatably supported in a state of being fitted into the opening of the main body 1. Ring-shaped washers 31 and 32 are arranged in a gap between the nut screwing portion 13 of the main body 1 and a corresponding portion of the valve body 2, and a spring 33 is provided between the washers 31 and 32. . Both washers 31, 32 prevent the spring 33 from rotating together by being pressed by the spring 33 against the inner wall of the nut 3 and the outer wall of the valve body 2, respectively. Although the nut 3 and the knob 21 of the valve body 2 are in contact with each other in FIG. 1, the knob 21 (that is, the valve body 2) can be rotated separately from the nut 3 as a matter of course.

As shown in FIG. 2 (schematic diagram of operation), the valve body 2 attached to the main body 1 has an opening / closing portion 20 for opening / closing the flow passage 10 of the main body 1. The opening / closing portion 20 is A linear first flow path portion 20a having opposed openings, a second flow path portion 20b vertically protruding from a side of the first flow path portion 20a, and a first flow path portion. 20a, the second flow path portion 20b
And a third flow path portion 20c communicating with the detection port 22.

Depending on the position of the valve body 2 (that is, the opening / closing part 20),
In the open state of the flow path 10, the first flow path portion 20a communicates with the gas supply side and gas consumption side piping systems of the pipe connection ports 11 and 12 [see (a) of FIG. 2]. In the closed state, the pipe connection ports 11 and 12 do not communicate with each other [see (b) and (c) of FIG. 2]. The second flow path portion 20b is the flow path 1
In the open state of 0, the pipes 11 and 12 do not communicate with the piping system [see (a) of FIG. 2], and in the closed state of the flow path 10,
It communicates with the pipe system of the pipe connection port 11 or 12 [see (b) and (c) of FIG. 2]. In addition, the third flow path portion 20c extends in the vertical direction to the first and second flow path portions 20a and 20b to reach the detection port 22, and regardless of the position of the opening / closing portion 20, the first and second flow path portions are always provided. The flow paths 20a and 20b communicate with the detection port 22. In addition, the valve body 2 shown in FIG.
Alternatively, the state is (c).

A female screw 23 is formed on the inner wall of the third flow passage portion 20c of the valve body 2, and a ring-shaped washer 24 is screwed onto the female screw 23. Further, facing the washer 24, another disc-shaped washer (opening / closing member) 25 is provided at the detection port 2
It is provided so as to be displaceable so as to block the flow path to 2. The washer 25 is urged by a coil spring (pressing member) 26 provided between the washers 24, 25 in a direction to close the flow path to the detection port 22, and the washer 25 normally closes the flow path to the detection port 22. To be Further, an O-ring 27 is provided between the washer 25 and the inner wall of the flow passage of the valve body 2,
This O-ring 27 is for ensuring that the washer 25 closes the flow path.

In the valve with the detection port constructed as described above,
When the gas pressure is not detected, for example, a plug plug (not shown) is screwed into the female screw 28 formed on the inner wall of the flow path of the detection port 22 of the valve body 2. In this case, irrespective of the position of the valve body 2, the third flow path portion 20c of the valve body 2 is connected to the detection port 2
Since the flow path to 2 is blocked by the washer 25, the gas does not leak from the detection port 22 to the outside of the valve together with the plug stopper screwed into the detection port 22.

When detecting the gas pressure, the plug is removed from the detection port 22, and the detection tool 4 having a cock 43 for opening and closing the internal flow passage 40 as shown in the drawing is used instead of the plug. Attach it to 22. Here, the male screw 41 formed on the outer wall of the detection tool 4 is screwed into the female screw 28 of the detection port 22. At that time, an O-ring 42 is provided between the detection tool 4 and the inner wall of the flow path of the valve body 2 to ensure that gas does not leak from the gap between the valve body 2 and the detection tool 4. When the detection tool 4 is completely attached to the detection opening 22, the washer 25 is pushed by the tip of the detection tool 4 against the biasing force of the coil spring 26, and the third flow path portion 20c of the valve body 2 is detected. Communicating with the flow path 40.

After the detection tool 4 is attached to the detection port 22, when the gas pressure is detected in a state where the gas supply side and gas consumption side piping systems of both pipe connection ports 11 and 12 of the main body 1 communicate with each other,
The knob 21 is turned to move the valve body 2 to the position shown in FIG. Then, the first flow path portion 20a of the valve body 2 is connected to the main body 1
Of the pipe system connected to both pipe connection ports 11 and 12 is detected through the first and third flow passage units 20a and 20c. It extends to the flow path 40 of the tool 4. And, at the time of detection, the cock 43
By turning to open the flow path 40, the gas pressure in a state where the gas supply side and the gas consuming side pipe systems connected to the valve are in communication can be detected.

In order to detect the gas pressure of the gas supply side or gas consumption side piping system connected to the pipe connection port 11 or 12 of the main body 1, the valve body 2 is connected to the valve body 2 shown in FIG. 2 (b) or (c). The position is set so that the first flow path portion 20a is closed and the second flow path portion 20b is in communication with the pipe system of the pipe connection port 11 or 12. Therefore, the gas pressure in one of the piping systems passes through the second and third flow path portions 20b and 20c, and the flow path 4 of the detection tool 4 is detected.
Since it reaches 0, it is possible to detect the gas pressure of only one piping system connected to the valve by opening the cock 43. As a result, if the gas supply side piping system is connected to the piping connection port 12 [see (b) of FIG. 2],
For example, since the gas pressure of the gas cylinder is known in advance, it becomes possible to inspect whether there is a leak in the piping system up to the valve with the detection port. On the other hand, when a gas consuming side piping system is connected to the piping connection port 11 [see (c) of FIG. 2],
For example, by applying gas pressure through the detection tool 4,
It becomes possible to inspect for leakage of the piping system from the valve with the detection port to the gas consuming device (gas stove, water heater, etc.).

When the gas pressure detection is completed, the cock 43 is turned to close the flow path 40, and then the detection tool 4 is removed from the detection port 22. Then, the flow path to the detection port 22 is closed by the washer 25 biased by the coil spring 26, and a plug plug is attached to the detection port 22 to restore it. In the embodiment shown in FIG. 1, the opening / closing part 20 has a non-spherical shape.
From the viewpoint of airtightness, it is preferable to provide packings 15 and 16 on the portion of the main body 1 facing the opening / closing portion 20 as shown in FIG. However, in FIG. 3, for the sake of convenience, the opening / closing section 20 is left as a non-spherical shape as in FIG. 1.

[0020]

Since the valve with a detection port of the present invention is configured as described above, not only the gas pressure detection in the state where the pipe systems of both pipe connection ports communicate with each other, but also the connection of either one of the pipes It is also possible to detect gas pressure only in the piping system of the mouth. As a result, not only can the gas pressure in the state where the gas completely flows and the gas pressure in the state where the gas does not flow at all can be measured, but only the gas pressure on either side can be measured, and the gas leakage test It can be easily performed by switching the body, and is very useful.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing the structure of a valve with a detection port according to an embodiment.

FIG. 2 is a schematic diagram for explaining the operation of the valve with a detection port according to the embodiment.

FIG. 3 is a sectional view of an essential part showing the structure of a valve with a detection port according to another embodiment.

FIG. 4 is a top view of a ball valve according to a conventional example.

FIG. 5 is a schematic diagram for explaining the operation of the ball valve according to the conventional example.

FIG. 6 is a schematic diagram following FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 main body 2 valve body 4 detection tool 10 flow path 11, 12 piping connection port 20 opening / closing part 20a first flow path part 20b second flow path part 20c third flow path part 21 knob 22 detection port 25 washer (open / close) Member) 26 coil spring (pressing member)

Claims (4)

[Claims] Claim: What is claimed is: 1. One and the other pipe connection ports, a detection port for connecting a detection tool, a first flow path portion having an opening facing each other, and a second flow path opening to the side of the first flow path portion. The flow path part of the
And a rotatable valve body having a first flow passage portion, a second flow passage portion and a third flow passage portion communicating with the detection port, and a knob for rotationally operating the valve body, When the valve body opens the flow path that connects the two pipe connection ports, the first flow path portion communicates with the both pipe connection ports and the second flow path portion closes, and the flow path is closed by the valve body. A valve with a detection port, characterized in that, when closed, the first flow channel part is closed and the second flow channel part is communicated with one or the other pipe connection port. 2. A main body having one and the other piping connection ports communicating with each other by a flow passage, a first flow passage portion having an opening facing the opening / closing portion for opening and closing the flow passage of the main body, and the first flow passage portion. A second flow path portion that opens to the side of the flow path portion, and a third flow path portion that communicates with the first flow path portion, the second flow path portion, and the detection port that connects the detection tool are provided. A valve body rotatably fitted in the body, and a knob for rotating the valve body. When the flow passage of the body is opened by the opening / closing portion of the valve body, the first flow The road portion communicates with both pipe connection ports of the main body and the second
When the flow passage of the main body is closed and the flow passage of the main body is closed by the opening / closing portion of the valve body, the first flow passage is closed and the second flow passage is communicated with one or the other pipe connection port. A valve with a detection port characterized by doing so. 3. An opening / closing member for opening / closing the third flow path portion,
The opening / closing member is provided with a pressing member for pressing the opening / closing member to a closed state of the third flow path portion, and the opening / closing member is opened when a detection tool is connected to the detection opening. The valve with a detection port according to claim 2. 4. A valve with a detection port according to claim 1, 2 or 3, wherein a plug plug is attached to the detection port.