JPH04351381A - Gas cock with by-pass port - Google Patents

Abstract

PURPOSE:To communicate the upstream side and downstream side of a gas cock with its by-pass port, in case the attitude of a rotary plug is set constant, irrespective of the type of the gas cock. CONSTITUTION:A groove 24 approx. parallel with the downstream flow-path of a passage hole 21 is formed in the trunk of a rotary plug 2 so that one end of the groove 24 is in communication with the outlet 12 and the other end is in communication with the by-pass port 3 open end on the plug accommodation part 10 side in the condition that part of the downstream end opening of the passage hole 21 is in mating with the outlet 12 while the rotary plug 2 is in the half-open attitude. A certain gap D is reserved between the edge of the downsteam end opening of the passage hole 21 and the edge in circumferential direction of the groove 24.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application and Summary of the Invention] The present invention relates to a gas cock with a relief hole, particularly when discharging air in a circuit on the upstream or downstream side of a gas cock, or when inspecting gas leakage in the circuit. This invention relates to a gas cock in which each of the above-mentioned operations can be performed through a relief hole in the gas cock.

0002

[Prior Art and Problems] A relief hole that is normally closed and can be communicated with the gas circuit on the upstream or downstream side of the gas cock when discharging air from the gas circuit or inspecting the gas circuit for gas leaks. A gas cock has been proposed. In this type of gas cock, when the gas cock is placed in a specific position, the relief hole communicates with the upstream or downstream side of the gas circuit connected to the gas cock, so each of the above operations can be performed in this state. Become.

Among the gas cocks having such functions, there is one disclosed in Japanese Utility Model Application Publication No. 64-25584, which has a relief hole in which the flow path inside the gas cock is bent into an L-shape. As shown in FIGS. 7 and 8, the cock body (1) has a lower inlet (11
), a gas circuit is formed which reaches the lateral outlet (12) via the upper stopper receptacle (10);
10) accommodates a rotating plug (2) having an inverted L-shaped passage hole (21) communicating with the inlet (11) and outlet (12). The rotating plug (2) is provided with an auxiliary hole (22) at a position opposite to the outlet of the passage hole (21). In addition, when the rotary plug (2) is rotated to the fully open position, a relief hole (3) is provided at a position that coincides with the auxiliary hole (22).
The escape hole (3) is removably closed by a plug (31). In this case, when the relief hole (3) is closed by the plug (31),
When the passage hole (21) and the outlet (12) are aligned as shown in FIG. 7, the inlet (11) and the outlet (12) communicate with each other, and from this state, when rotated 90 degrees as shown in FIG. Entrance (1
The circuit from 1) to the outlet (12) is interrupted. In this way, it can be used as a regular gas cock.

On the other hand, when inspecting the upstream and downstream gas piping connected to this gas cock for leaks, the plug (31) is removed and the inspection device is connected to the relief hole (3). When the upstream end of the upstream piping section (A) is closed and the downstream end of the downstream piping section (B) is closed, and the rotary plug (2) is fully opened as shown in FIG. (3) communicates with the upstream piping section (A) and the downstream piping section (B), and the presence or absence of gas leakage in the entire gas circuit can be detected. In addition, when releasing air from a newly installed gas pipe, as shown by the broken line in Figure 8, turn the rotary valve (2) from its fully closed position (solid line in the figure). By further rotating a certain angle in the same direction as the closing rotation direction of (2), a part of the outlet of the passage hole (21) communicates with the relief hole (3), and the auxiliary hole (22) is closed. state. As a result, the upstream piping section (A
), the passage hole (21) communicates with the outside via the relief hole (3), making it possible to exhaust air from the upstream piping section (A). It is also possible to check for leaks only in this upstream piping section (A).

[0005] A so-called linear gas cock in which the circuit from the inlet (11) to the outlet (12) of the cock body (1) is straight, and which exhibits a similar function, is the one disclosed in Utility Model Application Publication No. 1-1999. It is disclosed in Japanese Patent No. 94674. As shown in FIG. 9, this device has a configuration in which a relief hole (3) is provided in a portion of the wall surface of the plug accommodating portion (10) located between the inlet (11) and the outlet (12). A notch (23) is provided at one end of the passage hole (21) that passes through the stopper (2) at right angles to the axis. In this one, Figure 10
And as shown in FIG. 11, the relief hole (3) is connected to the plug (31
), it can be used as a normal gas cock, and with the plug (31) removed, the pivot cock (2) can be left half open as shown in Figure 11, and the open end on the upstream side of the passage hole (21) can be used as a normal gas cock. When the inlet (11) and the relief hole (3) are brought into communication through the notch (23) and the notch (23) following this, it becomes possible to vent air from the upstream piping section (A). Also,
As shown in FIG. 10, when the rotary plug (2) is slightly rotated from the above position in the direction of fully opening, the downstream open end of the passage hole (21) communicates with the outlet (12), and the relief hole (3) ) is the passage hole (
21) through the upstream piping section (A) and the downstream piping section (
B) communicates with both. As a result, the upstream piping section (A
) and the downstream piping section (B) can be inspected for leaks.

However, in these two advanced branch techniques, in the L-shaped gas cock and the straight gas cock, the relief hole (3) is in communication only with the upstream piping part (A), or the upstream piping part (A) The posture of the rotary plug (2) when communicating with both the side piping section (A) and the downstream piping section (B) is different. In other words, in an L-shaped gas cock, the rotary cock (
2) In order to ensure the correct condition, the posture of the rotary cock (2) must match the normal fully open posture, whereas with a straight gas cock, the posture should be approximately halfway between the fully open and fully closed postures. position (about 45 degrees rotated from the fully open position). Therefore, when performing air purge work or leakage inspection, it is necessary to change the rotational position of the rotating cock (2) depending on whether the gas cock being used is L-shaped or linear. , the desired work cannot be performed.

[0007] The present invention has been made in view of the above points, and consists of providing a relief hole (3) in the constitutive wall of the stopper accommodating portion (10) of the cock body (1); The upstream and downstream sides of the cock body (1) and the relief hole (3) can be closed as necessary, depending on the rotational position of the rotary stopper (2) accommodated in the stopper housing (10). In the gas cock with a relief hole that allows communication, regardless of the type of gas cock, when the rotary plug (2) is in the same position, the relief hole (3) and the upstream piping part (A) and The objective is to enable communication with the downstream piping section (B).

[0008]

[Technical Means] The technical means of the present invention for solving the above-mentioned problems is as follows.
A notch groove (24) extending over a certain range in the circumferential direction is formed in the body of the rotary stopper (2) facing the rotary stopper (2).
) in the half-open position of the rotating stopper (2), the passage hole (21
) is aligned with the outlet (12), and one end of the cutout groove (24) is aligned with the outlet (12).
and the other end communicates with the opening end of the relief hole (3) on the plug accommodating part (10) side, and the edge of the downstream end opening of the passage hole (21) and the notch groove (24) A certain distance (D) is provided between the circumferential edge and the circumferential edge.

[0009]

[Operation] The above technical means operates as follows. In the gas cock, the downstream end opening of the passage hole (21) and the outlet (12
), the rotary stopper (2) will be in the fully open position, and
The downstream end opening of the passage hole (21) is located 90 degrees from the outlet (12).
It will be in the fully closed position when rotated. When the rotary plug (2) is in the fully closed position, the notch groove (24) is located on the outlet (12) side, but the edge of the downstream end opening of the passage hole (21) and the periphery of the notch groove (24) Since a certain distance (D) is provided between the end edge of the direction, in the L-shaped gas cock, when the rotary stopper (2) is in the fully closed position, the seal portion corresponding to the distance (D) passes through. It is constructed between the downstream end opening of the hole (21) and the outlet (12). In addition, for a straight gas cock, the inlet (
11) side is closed by a seal portion between the upstream end opening and the downstream end opening of the passage hole (21). Therefore, regardless of whether the gas cock is L-shaped or linear, when the rotary cock (2) is in the fully closed position, the inlet (11) and the outlet (12) are blocked by the rotary cock (2). When rotated 90 degrees from this position in the fully open direction, the downstream end openings of the outlet (12) and the passage hole (21) align, resulting in a fully open position, and the inlet (11) and outlet (12) ). When the rotary stopper (2) is set in an intermediate position between the fully open position and the fully closed position, the passage hole (21)
One end of the cutout groove (24) communicates with the outlet (12) in a state where a part of the downstream end opening of the notch (24) is aligned with the outlet (12), and the other end is connected to the stopper accommodating part (10) of the relief hole (3). Since the location of the cutout groove (24) is set so that it communicates with the opening end on the ) side, the inlet (11) is connected to the passage hole (21).
→ Outlet (12) → Relief hole (3) via notch groove (24)
The outlet (12) communicates with the relief hole (3) via the cutout groove (24). This allows the relief hole (3) to communicate with the gas circuits on the upstream and downstream sides of the rotary plug (2). This relationship is the same regardless of whether the gas cock is L-shaped or linear, and the attitude of the rotary cock (2) at this time is also set to be the same.

0010

[Effects] Since the present invention has the above structure, it has the following unique effects. Upstream and downstream sides of gas cock and relief hole (3)
The state in which the valves are connected to each other is the same regardless of whether the gas cock is L-shaped or linear, and the posture of the rotary valve (2) at this time is also set the same, so the gas in the gas circuit connected to the gas cock is There is no need to worry about incorrect operation depending on the type of gas cock when inspecting for leaks or venting air.

[0011]

Embodiments Next, embodiments of the present invention described above will be described in detail with reference to the drawings. The embodiment shown in FIGS. 1 and 2 is an embodiment of the present invention in a linear gas cock, and in this embodiment, a notch groove (24) is formed parallel to the passage hole (21),
A relief hole (3) is provided at a position corresponding to the intermediate portion of the notch groove (24) when the rotary stopper (2) is set in the fully open position. This relief hole (3) is formed so as to penetrate from a cylindrical portion (32) formed on the outer surface of the cock body (1) to the constituent wall of the plug accommodating portion (10). The opening on the (10) side is an enlarged opening (33). The cylindrical portion (32) also has a relief hole (3).
A plug (31) for closing the circuit is screwed together, and when this plug (31) is attached, the circuit of the relief hole (3) is interrupted.

As shown in FIG. 2, the notched groove (24) is formed such that its bottom (25) is parallel to the axis of the passage hole (21). (
25) and the generatrix of the passage hole (21) (minimum thickness) is set to about 4 mm in this embodiment. The diameter of the inlet (11) and outlet (12) is the same as that of the passage hole (2).
Consistent with that of 1), their diameter is set to 13 mm. In this embodiment, as shown in FIG. 2-I, when the notch groove (24) is in a posture facing the outlet (12), the rotary stopper (2) is in a fully closed state, and the inlet ( 11
) to the outlet (12) is interrupted by this pivot plug (2). When the valve is rotated 90 degrees counterclockwise from this position, the state shown in FIG. 2-IV is obtained, and the rotary stopper (2) is set in the fully open position.

When rotated 45 degrees clockwise from this fully open position, the distance between the bottom (25) and the generatrix of the passage hole (21) will be the same as that between the inlet (11), the outlet (12), and the passage hole (21). In relation to this, since it is set as above, the seal part (26) between the passage hole (21) and the bottom part (25) is located in the middle of the outlet (12), and the seal part (26) between the passage hole (21) and the bottom part (25) is A part of the inlet (11) overlaps with a part of the inlet (11), and the outlet (12) and the enlarged opening part (33) communicate with each other via the notch groove (24).
1) side through a passage hole (21), an outlet (12), and a notched groove (24). Thereby, in this posture, both the upstream piping section (A) and the downstream piping section (B) connected to the gas cock are communicated with the relief hole (3). Therefore, in a gas circuit as shown in Figure 3, from the meter cock (M) to the terminal gas cock (E) at the piping terminal.
If an intermediate cock (T) configured as in the above embodiment is inserted in the vicinity of the terminal gas cock (E), the rotary cock (2) is set in the above position and the cylindrical part ( 3
2) is removed, the meter cock (M) is opened and the terminal gas cock (E) is closed.
) can be vented from the gas circuit. Further, by connecting a gas leakage inspection device to the relief hole (3) with the meter cock (M) in a closed state, it is possible to inspect for gas leakage from the meter cock (M) to the intermediate cock (T).

When the device is further rotated clockwise by a certain angle from the above-mentioned posture, the passage hole (21
) are closed by the constituent walls of the plug accommodating portion (10), and the outlet (12) and the enlarged opening portion (33) communicate only through the notch groove (24). Therefore, in the gas piping shown in FIG. 3, gas is once supplied to the downstream side of the intermediate cock (T) with the terminal gas cock (E) closed, and the rotary cock (2) of the intermediate cock (T) is moved to the above-mentioned position. When set to , the gas leak test device connected to the relief hole (3) will detect the
It becomes possible to test for gas leaks only in the circuit from the intermediate cock (T) to the terminal gas cock (E).

The embodiment shown in FIGS. 4 and 5 is a so-called L-shaped gas cock in which the present invention is implemented, and the passage hole (
21) is composed of an upstream passage section coaxial with the axis of the rotary stopper (2), and a downstream passage section bent at right angles from the upstream passage section, and the upstream passage section is formed in the cock body (1). It is constantly in communication with an inlet (11) provided below the stopper housing (10). The enlarged opening (33) is located at the passage hole (21).
The relationship with the downstream end opening is set to be the same as in the first embodiment. And, the enlarged mouth part of this example (
33) is located on the opposite side of the downstream end opening of the passage hole (21) when the rotary plug (2) is set in the fully closed position. Also in this example,
Similar to the above embodiment, the plug (31) is connected to the relief hole (
3) is closed, the circuit from the inlet (11) to the outlet (12) can be opened and closed by rotating the rotary plug (2), and the rotary plug (2) can be rotated 45 degrees clockwise from the fully open position. When the movement is made, as shown in FIG. is the passage hole (21
), the outlet (12) and the cutout groove (24). Furthermore, if the opening is rotated slightly clockwise from the above-mentioned position to the state shown in FIG. Become. In this way, also in the case of this L-shaped gas cock, when the rotary stopper (2) is set in the same posture as in the case of the linear gas cock of the previously described embodiment, the outlet (1
2) is in communication with the enlarged opening part (33), and both the inlet (11) and the outlet (12) are in communication with the enlarged opening part (33).
). In addition, the notch groove (24) is shown in Fig. 6.
It is also possible to excavate as shown in the figure. In this case, the cutting tool should be placed opposite the body of the rotating plug (2).
2) may be rotated at a certain angle to cut a groove of a certain depth.

[Brief explanation of the drawing]

FIG. 1: Cross-sectional view of Example 1 of the present invention

[Figure 2] Relationship diagram between the posture of the rotary stopper (2) and the communication state of the gas circuit

[Figure 3] Explanatory diagram of gas piping in which the gas cock of this example is adopted

[Fig. 4] Explanatory diagram of Example 2

[Figure 5] Relationship diagram between the posture of the rotary stopper (2) and the communication state of the gas circuit

FIG. 6 is an explanatory diagram of another form of notch groove (24).

[Figure 7
]Explanatory diagram of a conventional example of an L-type gas cock

[Fig. 8] Relationship diagram between the posture of the rotary stopper (2) and the communication state of the gas circuit

[Fig. 9] Explanatory diagram of a conventional example of a linear gas cock

[Figure 10]
Explanatory diagram when the relief hole (3) communicates with the inlet (11) and outlet (12)

[Fig. 11] Explanatory diagram when only the relief hole (3) and the inlet (11) are communicated

[Explanation of sign]

(1)...cock body (2)・
... Rotating stopper (10) ... Stopper housing part
(21)... Passing hole (3)... Relief hole (2
4)...Notch groove

Claims (1)

[Claims] 1. A relief hole (3) is provided in the wall constituting the stopper housing part (10) of the cock body (1), and the relief hole (3) can be closed as necessary. In a gas cock with a relief hole, the upstream and downstream sides of the cock body (1) can communicate with the relief hole (3) depending on the rotational position of the rotary plug (2) housed in the rotary plug ( In the body of the rotary stopper (2) facing the outlet (12) in the fully closed position of 2), there is a notched groove (
24), and when the rotary plug (2) is in the half-open position, a portion of the downstream end opening of the passage hole (21) coincides with the outlet (12), and the notch groove (24) One end of the groove (24) communicates with the outlet (12), and the other end communicates with the open end of the relief hole (3) on the side of the plug accommodating portion (10), and the downstream end of the passage hole (21). A gas cock with a relief hole in which a constant distance (D) is provided between the edge of the opening and the bottom of the notched groove (24).