JPH067225Y2 - Gas cock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a gas cock capable of easily performing air venting or leak inspection.

[Prior Art] Recently, the number of one-room apartments having only one gas appliance, for example, only a water heater, is increasing. In such a one-room apartment, the gas meter and the water heater are connected via a gas cock that is screwed. However, in such a case, since the hose cock for connecting the rubber hose is not installed, there is a problem that the air venting (air purging), the pressure test, and the leak test, which are conventionally performed through the hose cock, cannot be performed. It was

Therefore, one of the applicants of the present application first applied for a gas cock that can easily perform air purging and leakage inspection [Japanese Utility Model Application No. 64-11478 (Japanese Utility Model Application No. 62-10606).
No. 7)] As shown in FIGS. 8 and 9, an embodiment of the gas cock according to this earlier application has an inflow passage 11 and an outflow passage 12 whose center lines are aligned with each other, and these inflow passages 11 are formed. Further, the cock body 1 is formed with a taper-shaped plug insertion hole 13 which is orthogonal to them and the outflow passage 12, and a gas passage 21 which extends from one side of the outer peripheral surface to the other side thereof. The plug 2 is rotatably inserted into the insertion hole 13. The rotation range of the plug body 2 is restricted to a range of about 90 °.
As shown by the solid line in the figure, from the fully opened state in which the communication area where the center line of the gas passage 21 coincides with the center lines of the inflow passage 11 and the outflow passage 12 is the maximum, the handle 2 is used to move
Is rotated in one direction (clockwise in FIG. 9), the center line of the gas passage 21 is made orthogonal to the center lines of the inflow passage 11 and the outflow passage 12 through the half open state, and the inflow passage is formed by the plug body 2. It is possible to switch to a fully closed state (a state shown by an imaginary line in FIG. 9) in which the 11 and the outflow passage 12 are blocked.

Moreover, in order to perform the air purge and the leakage inspection, one side of the cock body 1 is provided with an air vent hole 15 having one end opening to the tip end surface of the protrusion 14 and the other end opening to the inner peripheral surface of the plug insertion hole 13. An outflow hole 22 is formed in the plug body 2, one end of which opens on the outer peripheral surface in contact with the plug insertion hole 13 and the other end of which opens on the wall surface of the gas passage 21. The air vent hole 15 and the outflow hole 22 are arranged so as to communicate with each other when the plug body 2 is in the fully open position. Therefore, by adjusting the stopper 2 to the fully open position, the air in the pipe can be extracted to the outside from the air vent hole 15. Further, in that state, a pressure gauge is connected to the air vent hole 15 via a gas tube such as a rubber hose fitted to the outer periphery of the protrusion 14, and the main plug on the gas meter side is closed to reduce the gas pressure in the pipe. By detecting whether or not there is a gas leak, it can be confirmed.

After the air venting is completed, the packing 4 is put in the air vent hole 15.
The stopper 6 is screwed in and fixed via the O-ring 5. Further, in the fully closed position, the outflow hole 22 faces the outflow passage 12 side.

[Problems to be Solved by the Invention] In the gas cock according to the above-mentioned application, since the air vent hole 15 and the outflow hole 22 communicate with each other when the gas cock is fully opened, the packing 4 and the O-ring 5 have a long life. If it deteriorates due to use, gas may leak from the air vent hole 15 when fully opened, that is, when the gas appliance is used.

[Object of the Invention] The present invention has been made in order to solve the above-mentioned problems, and it is of course possible to easily perform an air purge and a leak inspection, and even if the packing and the O-ring are deteriorated, an air vent hole is provided. An object of the present invention is to provide a gas cock that can minimize the leakage of gas from the gas cock.

[Configuration of the Invention] In order to achieve the above-mentioned object, the present invention has, on the cock body, one end opening to the inner peripheral surface of the plug insertion hole and the other end opening to the outer surface, and the inner peripheral surface of the plug insertion hole. The opening in is blocked by the plug when it is fully opened from the inflow passage and the outflow passage, when it is fully closed, it is blocked by the plug at least against the inflow passage, and when half-opened, it communicates with the inflow passage and the outflow passage through the gas passage. However, the main feature of the configuration is that an air vent hole to which a pressure gauge for measuring gas pressure can be connected is formed in the opening on the outer surface of the cock body.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. In the following embodiments, the same parts as those of the gas cock according to the above-mentioned application are designated by the same reference numerals and the description thereof will be omitted.

1 and 2 show an embodiment of the present invention. Also in the gas cocks shown in these figures, an air vent hole 15 is formed on one side of the cock body 1.
However, no outlet hole is formed in the plug body 2, and the air vent hole 15 is directly communicated with the gas passage 21 so that the air vent hole 15 is communicated with the inflow passage 11 and the outflow passage 12. Therefore, the following measures are taken here.

That is, the opening portion of the air vent hole 15 in the plug insertion hole 13 corresponds to the inflow passage 11 and the outflow passage 1 in the plug insertion hole 13.
It is located equally away from each of the two openings,
The distance between the openings of the air vent hole 15 and the inflow passage 11 and the distance between the openings of the air vent hole 15 and the outflow passage 12 are both set to W ₁ . In addition, the gas passage 2
The width of the openings at both ends of 1 (width in the rotation direction of the plug 2) is set to W ₂ . And these widths W
₁ and W ₂ are set to W ₁ <W ₂ .

When air purging is performed in the gas cock having the above configuration, the plug 2 is rotated from the fully open position shown in FIG. 1 (A) toward the fully closed position. Then, since the width W ₂ is wider than the width W ₁ , at an appropriate half-open position, as shown in FIG.
As shown in (B), one end of the opening of the gas passage 21 in the rotating direction of the plug 2 faces the inflow passage 11, and the other end faces the air vent hole 15.
Also, one end of the other opening of the gas passage 21 is connected to the outflow passage 1
Face 2 Therefore, the air vent hole 15 communicates with the inflow passage 11 and the outflow passage 12 through the gas passage 21 and is in the half open state, so that the air purge can be easily performed. Further, in that state, the pressure gauge is connected to the air vent hole 15 via the gas pipe fitted in the protruding portion 14, and the main plug on the gas meter side is closed to detect whether or not the gas pressure decreases. Leak inspection can be performed.

Further, during normal use after air purging, gas leakage occurs because the air vent hole 15 is blocked by the plug body 2 from the inflow passage 11 and the outflow passage 12 in both fully open and fully closed states. There is no danger and gas leakage may occur only when the air vent hole 15 is in the half-open state in which it faces the gas passage 21. However,
The gas cock is used in the fully open state or the fully closed state, and the air vent hole 15 faces the gas passage 21 only during the rotation from the fully open position to the fully closed position or from the fully closed position to the fully open position. It is an extremely short moment during the rotation. Therefore, even if the packing 4 or the O-ring 5 is deteriorated, gas leakage from the air vent hole 15 can be minimized.

Further, in the above-described embodiment, since the outflow hole formed in the stopper of the gas cock according to the previous application is not formed, the stopper 2 can be formed point-symmetrically with respect to its rotation axis. As a result, in the gas cock according to the previous application, the stopper 2 is rotated 180 ° from the normal position around the axis.
If it is erroneously inserted in the rotated state, it may not be possible to perform the air purge and the leakage inspection. However, in this embodiment, since it is formed point-symmetrically, there is no possibility of erroneous insertion.

Next, another embodiment of the present invention will be described. In addition,
It goes without saying that the air purge and the leakage inspection can be performed and the gas leakage can be minimized in the embodiments described below.

The gas cock shown in FIGS. 3 (A), (B), and (C) is the gas passage 2
The notch 23 is formed at one end of the one opening of the plug 1 in the rotation direction of the plug 2.

In this gas cock, it is needless to say that air can be vented from the air vent hole 15 by locating the plug body 2 in a half-open state in which air purging is possible as in the above-described embodiment (state of FIG. 3 (B)). That is, when the plug 2 is further rotated in the closing direction from that state, as shown in FIG. 3 (C), the inflow path 11 and the outflow path 12 are closed by the plug 2 into a semi-closed state. Become. In this semi-closed state, the air vent hole 15 and the outflow passage 12 are blocked by the plug body 2, while the air vent hole 15 communicates with the inflow passage 11 via the gas passage 21 and the notch 23. When the stopper body 2 is further rotated in the closing direction to be rotated approximately 90 ° from the fully opened position, the third
As shown by the imaginary line in FIG. In this fully closed state, the inflow path 11 and the outflow path 12 are blocked by the plug body 2, and the air vent hole 15 is blocked by the plug body 2 from the inflow path 11 and the outflow path 12. In this state, by connecting a pressure gauge to the air vent hole 15, it is possible to detect whether or not there is a gas leak on the upstream side of the gas cock. FIG. 10 (A),
The gas cocks shown in (B) and (C) have a notch 24 formed on the opposite side of 180 ° from the notch 23 of the gas cock shown in FIG. In this embodiment, since the notch 23 shown in FIG. 3 and the notch 24 located on the opposite side of 180 ° are formed, the air vent hole 15 is formed in the gas passage 2 when it is half closed.
1 and the cutout 24 to communicate with the outflow passage 12. Therefore, it is possible to detect whether or not there is a gas leak on the downstream side of the gas cock. The other actions are similar to those shown in FIG.

Furthermore, the gas cock shown in FIGS. 11 (A) and (B) is
A larger notch 25 is formed instead of the notch 24 so that the air vent hole 15 communicates with the outflow passage 12 through the gas passage 21 and the notch 25 even when the notch 24 is fully closed. In this gas cock, since the air vent hole 15 communicates with the outflow passage 12 even when fully closed, there is a risk that gas will leak from the air vent hole 15 when fully closed. There is no problem because it is only the gas that exists in the piping to the equipment and its amount is extremely small.

Further, the gas cock shown in FIGS. 4 and 5 is a so-called L-shaped cock in which the inflow passage 11 and the outflow passage 12 are orthogonal to each other, and the gas passage 21 also corresponds to the inflow passage 11 and the outflow passage 12, One end thereof is open to the lower end surface of the plug body 2 and the other end is opened to the outer peripheral surface of the plug body 2. Further, the opening of the air vent hole 15 in the plug insertion hole 13 is blocked from the inflow passage 11 and the outflow passage 12 at the time of fully opening and fully closing, and the portion facing the gas passage 21 at the time of fully closing and the outflow passage. It is located between the 12 openings.

In the above embodiment, the protrusion 14 was formed in a simple columnar shape, but as shown in FIGS. 6 and 7, the shape is the same as that of the hose end specified in JIS standard S2120. It may have a shape, and what is shown in FIG. 6 is one in which the stopper 6 is fixed to the opening of the projecting portion 14 which is the hose end through the packing 4 and the O-ring 5 as in the above-mentioned embodiment. As shown in FIG. 7, the projecting portion 14 which is a hose end has a packing 7 at the base end thereof.
It is covered with a cap 8 which is fixed by screwing through.

[Effect of Invention] As described above, according to the gas cock of the present invention,
In the cock body, one end opens on the inner peripheral surface of the plug insertion hole, the other end opens on the outer surface, and the opening portion on the inner peripheral surface of the plug insertion hole is
When fully open, the plug blocks the inflow and outflow passages, when fully closed, the plug blocks at least the inflow passage, and when half-opened, communicates with the inflow and outflow passages through the gas passage. Since an air vent hole to which a pressure gauge for measuring the gas pressure can be connected is formed in the opening on the outer surface, it is of course possible to easily perform an air purge and a leak test, and the gas leaks from the air vent hole. It is possible to obtain an effect such as that can be minimized.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 (A) is a plane sectional view showing a fully opened state, and FIG. 1 (B) is a plane sectional view showing a half opened state at the time of air purging. 2 and 3 are longitudinal sectional views, FIG. 3 shows another embodiment of the present invention, FIG. 3 (A) is a plane sectional view showing a fully opened state, and FIG. 3 (B) is a half opened state. FIG. 3 (C) is a plane sectional view showing a semi-closed state, FIGS. 4 and 5 show still another embodiment of the present invention, and FIG. 4 is a longitudinal sectional view. , FIG. 5 is the fourth
FIG. 6 is a cross-sectional view taken along the line V-V of FIG. 6, FIG. 6 and FIG. 7 are views showing a modified example of the protruding portion of the gas cock according to the present invention, and FIG. 8 and FIG. 9 are the gas cock according to the previous application. Fig. 8 is a longitudinal sectional view, and Fig. 9 is IX- in Fig. 8.
IX line sectional view, FIG. 10 shows another embodiment of the present invention, FIG. 10 (A) is a plane sectional view showing a fully opened state,
FIG. 10 (B) is a plane sectional view showing a half-opened state, FIG. 10 (C) is a plane sectional view showing a half-closed state, and FIG. 11 shows another embodiment of the present invention. FIG. 11A is a plan sectional view showing a fully opened state, and FIG. 11B is a plan sectional view showing a fully closed state. 1 ... Cock body, 2 ... Stopper, 11 ... Inflow passage, 12 ...
… Outflow path, 13 …… Plug insertion hole, 15 …… Air vent hole, 2
1 ... Gas passage.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Seiichi Matsumoto, 5-1, Hirano-cho, Higashi-ku, Osaka City, Osaka Prefecture, Osaka, Osaka Gas Co., Ltd. (72) Toshio Saito 109-1, Shinmachi, Joetsu City, Niigata Prefecture Joetsu Branch Office (72) Inventor Mario Iwakata 109-1 Shinmachi, Joetsu City, Niigata Prefecture Koyo Sangyo Co., Ltd. Joetsu Branch Office (56) Reference Japanese Patent Laid-Open No. 53-148726 (JP, A) Actual Development Sho 52-67037 ( JP, U) Actual development 57-181962 (JP, U) Special public account 55-50234 (JP, B2) Actual public 49-40823 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A cock body having a gas inflow passage and an outflow passage formed therein, and a tapered plug insertion hole formed between the inflow passage and the outflow passage, and the plug insertion hole. Correspondingly, a stopper having a gas passage formed therein, which is rotatably inserted in a state of being in contact with the plug insertion hole over the entire circumference, and which has a gas passage formed through the inside and at least one end of which is opened to the outer peripheral surface. From the fully opened state in which the plug body is rotatable in the normal and reverse directions in a range of approximately 90 °, and the communication area between the inflow passage and the outflow passage via the gas passage is the maximum, A gas cock in which the body is turned by approximately 90 ° in one direction to be switched to a fully closed state in which the inflow path and the outflow path are blocked by the plug body through a half-opened state. Open on the inner surface of the plug insertion hole. And the other end opens to the outer surface, and the opening in the inner peripheral surface of the plug insertion hole is blocked from the inflow passage and the outflow passage by the plug body when fully opened, and at least by the plug body when fully closed. An air vent hole, which is blocked from the inflow path and communicates with the inflow path and the outflow path via the gas path when half-opened, and to which a pressure gauge for measuring gas pressure can be connected is formed in the opening on the outer surface of the cock body. Gas cock that is characterized by doing.