JP2013083567A - Connector for gas pressure detection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily inspect gas leakage of a pipe, joint, or the like on an upstream side leading to a gas meter from a meter gas plug even when there are a plurality of pipes, joints, and the like between the gas meter and the meter gas plug with respect to a connector for gas pressure detection for detecting gas leakage of pipes or the like on the upstream side and downstream side of the gas meter where a gas inflow cylinder part and a gas outflow cylinder part of the gas meter are connected via connection joints (34)(35) for a meter.SOLUTION: The connector for gas pressure detection comprises a main cylinder part (11) one end of which is freely removably/attachably connectable to the connection joints (34) (35) for a meter that are connected to a pipe on the upstream side and a pipe on the downstream side of the gas meter respectively and a plug cylinder (12) one end of which is connected to the other end of the main cylinder part (11) and to the other end of which a socket (4) is freely removably/attachably connectable. Inside the plug cylinder (12), a normally-closed valve body (26) which opens by connection to the socket (4) is built, and opening of the valve body (26) communicates the plug cylinder (12) and the main cylinder part (11).

Description

  The present invention relates to a gas pressure detection connector, and more particularly to a gas pressure detection connector that detects gas leakage from a pipe downstream from a meter gas plug to a terminal gas plug.

FIG. 6 is a perspective view of a main part of a general gas meter (50).
A gas inflow cylinder (51) and a gas outflow cylinder (52) protrude from the upper surface of the gas meter (50), and a connecting pipe for the meter gas plug (20) is connected to the gas inflow cylinder (51). A vertical pipe (33) of a T-shaped pipe joint (30) as a gas pressure detection connector is connected to the gas outflow cylinder (51) via a connection joint (54). It is connected.

The meter gas plug (20) is connected to a gas supply pipe (31) that feeds gas into the gas meter (50).
In addition, the gas that passes through the gas meter (50) is sent to the indoor gas equipment at the rear end of the horizontal pipe (32) that communicates with the vertical pipe (33) of the T-shaped pipe joint (30) and opens back and forth. The feed pipe (3) is connected, and the front end of the horizontal pipe (32) is screwed and connected to a plug cylinder (2) to which a gas leak inspection socket (4) can be detachably connected. Yes.

  The socket (4) is connected to the tip of the rubber tube (41) extending from the pressure measuring device (40) .When the socket (4) is connected to the tip of the plug tube (2), the socket (4) The valve body built in the plug cylinder (2) is pushed by the push rod provided in the valve to open, and the pressure of the gas flowing from the gas meter (50) to the feed pipe (3) is measured by the pressure measuring device (40). Can be measured.

  When using the pressure measuring device (40) as described above to check for gas leaks in the gas piping path from the meter gas plug (20) to the terminal gas plug, Gas leak inspection will be conducted after the gas piping is completed.

JP-A-10-122926

  However, in high-rise houses, city gas has a lower specific gravity than air, so the gas pressure of the gas sent from the gas supply pipe (31) in the pipe shaft to the gas meter (50) is higher than in low-rise houses. For this reason, as shown in FIG. 7, the connection part of the pressure regulator (5) is connected to the gas inflow cylinder part (51) of the gas meter (50) through the connection cylinder part (34) for the meter. The pressure of the gas sent downstream from the gas meter (50) is adjusted by the pressure regulator (5).

In this device, the meter gas plug (20) is connected to a gas supply pipe (31) in a pipe shaft of the building, and the metal gas pipe (36) is connected to the meter gas plug (20) via a flexible pipe joint (42). ), An L-shaped joint (37) is connected to the metal flexible pipe (36) via a flexible pipe joint (43), and the upstream end of the pressure regulator (5) is connected to the L-shaped joint (37). Is connected.
Between the meter gas plug (20) and the gas inflow cylinder (51), as described above, the flexible pipe joint (42), the metal flexible pipe (36), the flexible pipe joint (43), the L-shaped joint ( 37) And since the pressure regulator (5) is newly provided, there are many piping connections from the meter gas plug (20) through the gas meter (50) to the gas feed pipe (3). When checking for gas leaks in the gas piping downstream of the meter gas plug (20) using the gas pressure detection connector attached to the gas inflow cylinder (51) of the gas meter (50) as described above Therefore, after completing the gas piping from the meter gas plug (20) to the terminal gas plug, the gas leak will be inspected to identify whether the gas leak is upstream or downstream of the gas meter (50). It will take time. Also, when a gas leak point is detected upstream of the gas meter (50), it is necessary to work in a narrow space in the pipe shaft, and the gas meter (50) and pressure regulator (5) must be removed and repaired. In some cases, it takes time for repair work.

  In this way, when the gas leak inspection of the piping structure for a high-rise house as described above is performed using the conventional gas pressure detection connector as shown in FIG. Since it is necessary to examine the gas piping path on the upstream side and downstream side of the gas meter, it takes a lot of time to identify the gas leak location, and if a gas leak location is detected on the upstream side of the gas meter, repair work is required. There is also a problem that it takes time.

  The present invention relates to a "gas pressure detection connector for detecting gas leaks in pipes on the upstream side and downstream side of a gas meter in which a gas inflow tube portion and a gas outflow tube portion of the gas meter are connected via a meter connection joint". Even if the meter gas plug located on the upstream side of the gas meter is provided with a plurality of pipes and joints interposed between the gas meter and the meter gas plug, the downstream side of the gas meter It is an object of the present invention to provide a gas pressure detection connector that can easily check for gas leaks in pipes and joints on the upstream side from the meter gas plug to the gas meter as well as gas leaks in the pipe.

The technical means of the present invention for solving the above-mentioned problems is as follows: “A main cylinder whose one end is detachably connectable to a meter connection joint connected to a pipe on the upstream side and a pipe on the downstream side of the gas meter. And
One end is connected to the other end of the main cylinder and the other end is a plug cylinder that can be detachably connected to a socket.
A valve device is built in the plug cylinder,
By opening the valve device, the plug cylinder and the main cylinder portion communicate with each other ”.

The technical means operates as follows.
One end of the main cylinder part is connected to the meter connection joint that is connected to the upstream pipe and the downstream pipe of the gas meter and before connecting the gas inflow cylinder part and the gas outflow cylinder part of the gas meter. . At this point, since the plug cylinder is closed by the valve device, the gas passage from the plug cylinder to the meter gas plug on the upstream side of the gas meter through the meter connection joint, and the terminal gas plug on the downstream side. The gas path to reach is closed.
First, a socket connected to a pressure device such as a manual pump is attached to the plug cylinder. When the socket is mounted and the valve device in the plug cylinder is opened, air or the like can be sent into the gas passage and pressurized by the pressurizing device.
Next, when the inside of the gas passage is pressurized until reaching a predetermined pressure, the gas passage is switched to a gas passage connected to a pressure measuring device, and it is confirmed whether or not a pressure drop is observed in the gas passage. .

  In addition, in the case where the one end of the main cylinder portion is the same as the male screw cylinder portion formed in the gas inflow cylinder portion and the gas outflow cylinder portion of the gas meter, The main cylinder portion can be directly screwed.

  As described above, according to the gas pressure detection connector according to the present invention, when the gas meter is newly installed or replaced, it is only necessary to connect the main cylinder part to the meter connection joint before the gas meter is connected. It is possible to attach a connector, and it is possible to inspect the gas leak in the upstream gas passage from the gas pressure detection connector to the meter gas plug as well as the downstream gas passage to the indoor gas equipment. Become. Therefore, even in a high-rise housing piping structure in which a plurality of joints, piping, and pressure regulators are interposed between the meter gas plug and the gas pressure detection connector, gas leakage on the upstream side of the gas meter Can also be easily inspected.

  In addition, if the male screw cylinder part that is the same as the male screw part constituting the gas inflow cylinder part and the gas outflow cylinder part of the gas meter is formed in the main cylinder part, the main cylinder part is directly connected to the meter connection joint. Since it can be connected, the workability of the gas leak inspection is improved. Also, if there is a problem when screwing the main cylinder part into the meter connection joint, it will be understood that the female thread of the meter connection joint is incompatible, so check the meter connection joint for defects before installing the gas meter It can also function as an inspection tool.

  Furthermore, if the main tube portion is a bent tube bent in a substantially L shape, the direction in which the socket is connected can be made horizontal, so that the main tube portion is a straight tube or a substantially L shape depending on the situation of the gas pipe. Workability is improved by properly using different items.

It is a front view of the connection joint for meters which connects the connector for gas pressure detection of an embodiment of the invention. It is sectional drawing of the connector for gas pressure detection of embodiment of this invention. It is a fragmentary sectional view which shows the state which connected the connector for gas pressure detection of embodiment of this invention to the connection joint for meters of the upstream of a gas meter. It is explanatory drawing of the modification of the connector for gas pressure detection of embodiment of this invention. It is explanatory drawing of the further another example of the connector for gas pressure detection of embodiment of this invention. It is explanatory drawing which shows an example which test | inspects a gas pressure using the connection tool for conventional gas pressure detection. It is explanatory drawing which shows the other example which test | inspects a gas pressure using the conventional connector for gas pressure detection.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring an accompanying drawing.
FIG. 1 is a front view of the meter coupling (34) (35) with the gas meter removed. These two meter connection joints (34) and (35) are screwed to a mounting plate (44), and the mounting plate (44) is fixed to an upright pole or wall for installing a gas meter.

  As shown in FIG. 7, the gas inflow tube portion (51) located on the upstream side of the gas meter (50) and the gas outflow tube portion (52) located on the downstream side are composed of male screw tube portions. The lower open ends of the meter connection joints (34) and (35) with the upper open ends of the gas connection section (51) and the gas outflow tube section (52) facing the lower open ends of the meter connection joints (34) and (35), respectively. The gas meter (M) is connected to the meter joint (by connecting the cap nuts (21) and (22) respectively attached to the gas inflow cylinder part (51) and the gas outflow cylinder part (52). 34) It can be attached to (35).

FIG. 1 shows a state in which the gas pressure detection connector (1) of the embodiment of the present invention is connected to the cap nut (22) of the downstream meter connection joint (35), and FIG. 2 shows a state in which the gas pressure detection connector (1) of the embodiment of the present invention is connected to the cap nut (21) of the upstream meter connection joint (34).
As shown in FIG. 2, the gas pressure detection connector (1) includes a main cylinder part (11) and a plug cylinder (12) screwed to the main cylinder part (11).

  One end (the upper end in the drawing) of the main cylinder (11) is an external thread cylinder that constitutes the gas inflow cylinder (51) and the gas outflow cylinder (52) of the gas meter (50) shown in FIG. The same male screw cylinder portion (13) is formed, and can be screwed into the cap nuts (21) and (22). A female thread portion (14) is formed on the other end side of the main cylinder (11).

The plug cylinder (12) includes a male screw part (12a) that can be screwed into the female screw part (14) and a plug part (12b) to which the socket can be detachably connected. The male screw part (12a) located in the middle part of the plug is connected to the male screw part (12a) of the plug cylinder (12) by screw connection with the female screw part (14) of the main cylinder part (11). A tool-corresponding part (23) for making the tool correspond, and an O-ring (24) is mounted on the outer peripheral surface closer to the plug part (12b) than the tool-corresponding part (23).
And, in order to screw the protective cap (10) fitted into the plug portion (12b) into the predetermined area on the outer surface of the body portion of the plug portion (12b) when the gas pressure detection connector (1) is not used. The male screw portion (25) is formed.

  A valve body (26) is built in the plug cylinder (12), and the valve body (26) is normally urged in the valve closing direction by a coil spring (27) unless a socket is connected.

As such a plug cylinder (12), a well-known metal plug to which a socket (4) for connecting a gas pipe as shown in FIG. 3 can be connected can be adopted, and the plug portion of the plug cylinder (12) can be adopted. When the socket (4) is connected to (12b), the valve body (26) in the plug cylinder (12) is forced to the urging force of the coil spring (27) by the pressing shaft (not shown) in the socket (4). The gas pressure detection connector (1) is configured to open by being pushed rearward against it.
Therefore, the socket (4) to which the pressurizing device and the pressure measuring device (40) are connected is connected to the gas pressure detecting connector (1) to pressurize or send the pipe to be inspected for gas leakage. The pressure of the gas that is generated can be measured.

  The gas pressure detection connector (1) according to the present invention includes a cap nut (21) (22) attached to a meter connection joint (34) (35) to which a gas meter is not attached, such as before a new gas meter is installed or when the gas meter is replaced. ) Through which the male threaded cylinder part (13) of the main cylinder part (11) is screwed and connected, so the cap nuts (21) (22) are screwed into the male threaded cylinder part (13). If the compatibility is poor at the time of combining, it will be found that both or one of the cap nuts (21), (22) is defective. In this case, since the meter connection joint (34) (35) can be replaced before the gas meter is mounted, the gas pressure detection pressure connector (1) of the present invention is provided with the meter connection joint (34) ( It can also function as an inspection tool for inspecting defects in the cap nuts (21) and (22) of 35).

Hereinafter, using the gas pressure detection connector (1), in particular, the meter connection joint (34) on the upstream side of the gas meter as shown in FIG. 7 is connected to the pressure regulator (5). The case where the pressure detection of a piping structure in that case or a gas leak inspection is implemented is demonstrated.
On the upstream side of the gas meter (50), a meter gas plug is connected via a pressure regulator (5), L-shaped joint (37), flexible pipe joint (43), metal flexible pipe (36), flexible pipe joint (42). (20) is connected, and the meter gas plug (20) is closed during the gas pressure test.

  First, as shown in FIG. 3, the main cylinder portion (11) of the gas pressure detection connector (1) is opposed to the downstream end of the meter connection joint (34) connected to the pressure regulator (5). At the same time, the gas pressure detection connector (1) is connected to the meter connection joint (34) by screwing the cap nut (21) onto the external thread portion (13) of the main cylinder portion (11). .

Then, the protective cap (10) is removed from the plug cylinder (12), and the socket (4) connected to the pressure device (40a) via the rubber tube (41) is attached to the plug portion (12b).
Due to the connection of the socket (4), the valve body (26) is opened by being pushed in by a pressing shaft (not shown) built in the socket (4), and from the gas pressure detection connector (1). The gas passage communicates with the meter gas plug (20). In this state, the gas passage is pressurized using the pressurizing device (40a).

After pressurizing until it reaches a predetermined value, switch the flow path of the three-way valve (45) to the pressure measuring device (40) side such as a digital manometer, and confirm whether a pressure drop is observed in the gas passage. .
If a pressure drop is detected, gas leak may be detected, so apply Monge liquid etc. to pipes and joints in the range from the meter connection fitting (34) to the meter gas plug (20). To detect leaks. If the leak location can be identified, the construction may be performed again, and the gas leak inspection may be performed again using the pressurizing device (40a) and the pressure measuring device (40).

  In this way, by using the gas pressure detection connector (1) of the embodiment of the present invention, before the gas meter is attached, the metal gas can be connected from the pressure regulator (5) upstream of the gas meter to the meter gas plug (20). Even if it is a gas pipe for a high-rise house in which a flexible pipe or a joint is interposed, a gas leak inspection can be performed.

  In order to detect gas leaks in the piping on the downstream side of the gas meter, make sure that all of the indoor gas plugs are closed, and connect the gas outlet cylinder on the downstream side of the gas meter as shown in FIG. The gas pressure detection connector (1) is connected to the meter connection joint (35) via the cap nut (22). As a result, the gas passage on the downstream side of the gas meter can be closed. Therefore, in the above-described manner, the gas pressure detection connector (1) of the present invention can be used to check for gas leakage. In the case where the conventional T-shaped pipe joint (30) as shown in FIG. 5 is provided as the connection joint (35), the gas pressure detection connector (1) is connected to the vertical pipe (33). By using the plug as a plug, it is possible to perform inspection using a conventional gas pressure detecting device.

  FIG. 4 is an explanatory view of a modified example of the gas pressure detection connector (1), in which the main cylinder portion (11) constituting the gas pressure detection connector (1) is bent in an L shape. By using the bent tube, the direction of the plug portion (12b) of the plug cylinder (12) can be oriented in a desired direction. As a result, even when the gas meter is installed in a small space, the plug part (12b) can be oriented in a direction that makes it easy to connect the socket, so the usability of the gas pressure detection connector (1) is improved, and the gas Leak detection can be performed more easily.

  FIG. 5 is a cross-sectional view showing a plug cylinder (120) and a cap (110) of a gas pressure detection connector (100) using a taper-shaped thread (15) as a valve device. In this case, the valve device can be opened and closed by rotating the thread (15) without being related to the mounting of the socket.

(1) ・ ・ ・ ・ ・ ・ ・ Connector for gas pressure detection
(11) ... ・ Main cylinder part
(12) ... ・ Plug cylinder
(26) ... Valve
(34) (35) ・ ・ ・ ・ ・ Connector for meter
(4) ・ ・ ・ ・ ・ ・ ・ Socket

Claims (3)

In the gas pressure detection connector for detecting gas leaks in the upstream and downstream pipes of the gas meter to which the gas inflow cylinder part and the gas outflow cylinder part of the gas meter are connected via the meter connection joint,
A main cylinder part that can be detachably connected at one end to the meter connection joint connected to the upstream pipe and the downstream pipe of the gas meter,
One end is connected to the other end of the main cylinder and the other end is a plug cylinder that can be detachably connected to a socket.
In the plug cylinder, a normally closed valve device that opens by connecting the socket is built-in,
The plug for gas pressure detection and the connector for gas pressure detection are characterized in that the plug cylinder and the main cylinder section communicate with each other by opening the valve device.   2. The gas pressure detection connector according to claim 1, wherein the one end of the main cylinder part is a male screw cylinder part identical to a male screw part formed in a gas inflow cylinder part and a gas outflow cylinder part of the gas meter. A connector for detecting gas pressure.   3. The gas pressure detection connector according to claim 1, wherein the main cylinder portion is a bent tube bent in a substantially L shape.