JP2003329186A - Pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint easily connectable to a gas outlet pipe 50 of a gas meter M, allowing replacing of the gas meter without stopping the gas supply to an indoor side, and completing of the airtight test and the air- bleeding work only by outdoor work. <P>SOLUTION: A first connection port 11 connected to the gas outlet pipe 50, a second connection port 12 communicated with the indoor piping, a third connection port 13 to which gas pressure checking tools 39, 49 are connected, and a fourth connection port 14 for an auxiliary circuit are communicated with a spigot housing 10, a spigot body 2 is rotatably accommodated in the spigot housing 10, and the spigot body 2 comprises first and second communication holes 21, 22 not communicated with each other, and is freely switched from a first attitude to a second attitude by the rotation. In the first attitude, the first and second connection ports 11, 12 are communicated through the first communication hole 21, and in the second attitude, the second and fourth connection ports 12, 14 are communicated through the first communication hole 21 to configurate a first auxiliary channel 31, and simultaneously the fist and third connection ports 11, 13 are communicated through the second communication hole 22 to configurate a second auxiliary channel 32. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a pipe joint connected to a gas outlet pipe of a gas meter.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 7, between a lead-in pipe (4) extended from a main pipe in the ground and a feed pipe (5) for feeding gas into each home, A gas meter (M) for measuring the amount of gas used at home is provided, and these are installed outdoors.

In this type of gas meter (M), a gas inlet pipe (40) and a gas outlet pipe (50) are arranged side by side at the upper end of a meter body in which a measuring instrument or the like is built. (40) is a pair of bent pipes connected to both ends of the straight pipe (42).
The lead-in pipe (4) is connected via (41a) and (41b).
On the other hand, to the gas outlet pipe (50), a feed pipe (5) is provided through a pair of bent pipes (51a) (51b) connected to both ends of the straight pipe (52).
Are connected. As a result, the lead-in pipe (4) and the feed pipe (5) are connected via the gas meter (M). The intake pipe (4) is provided with a gas plug (43) for opening and closing the flow path.

The gas meter (M) needs to be replaced at a predetermined cycle. During the replacement work, the gas plug (43) is closed to shut off the gas supplied from the lead-in pipe (4). As a result, even if the gas meter (M) is removed, there is no risk of the gas leaking out from the gas inlet pipe (40).

[0005]

As described above, in the prior art, when the gas meter (M) was replaced, the gas plug (43) had to be closed and the gas temporarily stopped, so It requires the consent of the family members. Also, gas meter
After the replacement of (M), airtightness test and air bleeding must be performed in the range from the gas meter (M) to the feed pipe (5) and further to the indoor side pipe (53). Household gas appliances (5) connected to the inner pipe (53)
Workers have to climb into each house because they have to ignite and check 4).

As described above, the gas meter (M) is conventionally troublesome to obtain consent from a family member, and when the family member is absent, an airtight test and an air bleeding confirmation work are required. There was a problem that I could not.

Japanese Patent Application Laid-Open No. 129630/1994 proposes that the gas can be used even during the operation of replacing the gas meter and the air bleeding check is unnecessary. This one provides a method and device that allows gas to be used even when the gas meter is replaced by using a bypass hose and eliminates the need for an air-bleeding ignition test.However, the bypass hose can be used for escheese that is attached to a new main pipe. It has to be connected, requires extensive installation work, and cannot be easily implemented on existing gas meters.

The present invention is a "pipe joint that can be connected to the outlet pipe of a gas meter", which enables replacement work of the gas meter without stopping the supply of gas indoors, as well as airtightness test and air bleeding work. Another object is to provide a pipe joint that can be completed only by outdoor work.

[0009]

[Means for Solving the Problem] * 1 Technical means of the present invention for solving the above-mentioned problems include "a first connecting port connected to a gas outlet pipe of a gas meter and a feed pipe for feeding gas indoors. And a third connection port to which the gas pressure inspection tool is connected, and a fourth connection port for the auxiliary circuit are formed so as to communicate with the plug storage chamber, respectively. A plug body for connecting or disconnecting these connection ports is rotatably accommodated in the plug body. The plug body has two first and second non-communication states.
A communication hole is formed, and the plug body can be switched from a first posture to a second posture in accordance with the rotation, and when the plug body is in the first posture, the first connection port is formed. And the second connection port communicate with each other through the first communication hole to form a gas main flow path, and when the plug body is in the second posture, the gas main flow path is blocked and A first auxiliary flow path is configured by communicating the first connection port and the third connection port through either one of the first or second communication holes, and at the same time, the second connection port. And the fourth connection port are communicated with each other through the other one of the first and second communication holes so that the second auxiliary flow path is configured. ”

The above technical means operates as follows. Each of the first to fourth connection ports provided in the pipe joint is open to the plug accommodating chamber inside the joint, and the gas plugs rotatably accommodated in the plug accommodating chamber allow mutual flow paths. Shut off or open. A gas outlet pipe of a gas meter is connected to the first connection port, and a feed pipe for sending gas indoors is connected to the second connection port. When using normal gas,
The gas plug is set to the first position, and the gas sent from the intake pipe into the gas meter is sent from the gas outlet pipe into the pipe joint through the first connection port to the first communication hole of the gas plug. After passing through, it will be sent to the feed pipe through the second connection port, and will be supplied indoors.

When replacing the gas meter, before removing the gas meter, connect the gas hose for the gas pressure inspection tool to the third connection port, and connect the gas hose for supplying gas to the fuel container to the fourth connection port. After that, the gas plug is rotated so as to be in the second posture. By setting the gas stopper in the second posture, the main gas flow path from the first connection port to the second connection port is blocked, and the first auxiliary flow path from the first connection port to the third connection port is provided, A second auxiliary flow path from the fourth connection port to the second connection port is opened via the first communication hole or the second communication hole of the gas plug. Then, the gas is shut off on the upstream side of the gas meter. As a result, the gas does not flow into the gas meter, but the gas from the fuel container flows into the feed pipe through the second auxiliary flow path. In this state, remove the gas meter and perform replacement work. After replacement, first
An air-tightness test is performed by sending in air at a specified pressure from the auxiliary channel. After that, the gas plug that was blocked on the upstream side of the gas meter is opened. The gas flowing into the gas meter will flow through the first auxiliary flow path to the gas hose connected to the first connecting tube portion, and therefore, this is used to bleed air in the gas meter and in the upstream piping thereof. . During this time, the gas from the fuel container is continuously supplied to the feed pipe. After deflating the air, rotate the gas plug to return to the first posture, and remove the gas hose from the third connection port and the fourth connection port.
Gas meter replacement work is completed.

* 2 In the paragraph 1), "The first communication hole is configured to penetrate the inside of the plug body, and the second communication hole is formed by cutting the outer peripheral surface of the plug body in the circumferential direction. The second communication hole corresponds to a portion surrounded by the groove formed on the outer peripheral surface of the plug and the side wall of the plug receiving chamber. The shape and position of the first communication hole,
In addition, the formation position of the groove portion of the second communication hole, the cut length, etc. are
Therefore, it may be appropriately set depending on the position of the fourth connection port, the direction of the gas plug, and the like.

* 3 In the item 1 or 2, "In the plug accommodating chamber, an operation port for rotating the plug is opened, and in the operation port, the plug is In a state where the operation port is accommodated in a predetermined posture in the stopper accommodating chamber, it is configured to be closed in an airtight state by a removably provided obstruction stopper. " Since it is closed in an airtight state by the gas, gas does not leak from the operation port. Then, the blocking plug is removed only when it is necessary to change the posture of the plug, such as when replacing the gas meter. An operation port is opened in the plug accommodating chamber from which the blocking plug is removed, and the plug can be rotated from the operation port.
After rotating the stopper in a predetermined direction, the stopper housing is attached again to keep the stopper chamber airtight.
The blocking plug may be set so that it cannot be removed by a special tool so that it cannot be accidentally removed by mischief.

* 4 In each of the above paragraphs, "the third and fourth connection ports are connection tube parts to which gas hoses can be detachably connected, and the connection tube parts when not in use are removable closure caps. Are covered in an airtight state by means of "when used in normal gas, the connection cylindrical portions formed in the third and fourth connection ports are covered with respective closure caps, and when not in use. The airtightness of the third and fourth connection ports in the above will be ensured. Then, when replacing the gas meter, these caps are removed, and a gas hose extending from the gas pressure inspection instrument is connected to the third connecting port side connecting cylinder part, and a fuel container is extended to the fourth connecting port side connecting cylinder part. The gas hose can be connected. Also, if the shape of these connecting cylinders is made to match the outer shape of a general plug part in which an annular groove is formed in the outer peripheral portion of the tip, a socket for connecting a gas hose incorporating a conventional coupling device. A gas hose can be connected via.

Further, as described in item 5, "the third and fourth connection ports are connection tube portions to which gas hoses can be detachably connected, and the connection tube portions are set to be removable when not in use. In the case of a normal gas, the connecting cylinder can be removed.

[0016]

The present invention, having the above-mentioned structure, has the following unique effects. When exchanging the gas meter, even if the gas flow path is blocked on the upstream side of the gas meter, the gas can be sent from the separately connected fuel container to the feed pipe leading to the indoor gas appliance. The gas meter can be replaced without stopping the supply of gas. Also, the air bleeding work after replacing the gas meter can be completed only by outdoor work, which saves the trouble of going up to the equipment installation place in each home to check the air bleeding, and even when the housekeeper is absent. Can be replaced. Thus, the gas meter can be easily replaced, the efficiency of the replacement work is improved, and the time required for the work is shortened. Furthermore, since it suffices to replace a part of the pipe on the downstream side of the existing gas meter with the pipe joint of the present invention, large-scale construction for providing the auxiliary flow path is not necessary, and when using normal gas Since the switching from the main gas flow passage to the first and second auxiliary flow passages when the gas meter is replaced can be performed only by turning the plug, the switching operation of the flow passage is easy, and switching mistakes can be reduced.

In addition to the above-mentioned effects, in the item (2), the first and second communication holes can be reliably formed in a non-communication state even in a small plug body, and the structure of the plug body is simplified. And can be easily manufactured.

Further, in the item (3), the operation port opened in the plug accommodating chamber is tightly closed with a closing plug,
There is an advantage that the stopper body is not inadvertently rotated due to mischief or the like, and that the stopper chamber can be kept airtight. Further, if the blocking plug is removed, the plug body can be easily rotated. In the section 4, the gas hose can be easily attached to the third and fourth connection ports. In addition, if the connecting cylinder is configured like a plug part of a general gas stopper and a socket is provided at the connecting end of the gas hose, it becomes possible to attach / detach to / from each of the connecting cylinders with one touch. In addition, the work of attaching the gas hose can be reliably performed.

In item 5, in addition to the effect of item 4, the connecting cylinder can be removed when not in use (when normal gas is used), so that a neat appearance can be achieved. On the top, the connection tube part is in the way,
There is no inconvenience of being mischievous.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the embodiments of the present invention described above will be described in detail with reference to the drawings. The gas meter used in the embodiment of the present invention is set to have an internal structure similar to that of a conventional one, and a gas inlet pipe (40 ) And the gas outlet pipe (50) are projected, and the intake pipe (4) connected upstream of the gas inlet pipe (40) has a gas plug (43) for opening and closing the flow path.
It is possible to employ a structure similar to that of the related art in which is provided. However, in this embodiment, the joint to be connected to the gas outlet pipe (50) is inserted from the conventional bent pipe (51a) into the pipe joint (1) of the embodiment of the present invention as shown in FIG. The configuration will be replaced.

FIG. 1 is an enlarged sectional view of the pipe joint (1) when the gas meter (M) is viewed from the front.
FIG. 3 is an enlarged cross-sectional view of the pipe joint (1) when the gas meter (M) is viewed from the left side.

The structure of the pipe joint (1) will be described. As shown in FIG. 1, the pipe joint (1) is a four-way joint having four connection ports opened vertically and horizontally, and the gas outlet pipe (50) is provided at a first connection port (11) opened downward. A feed pipe for feeding gas indoors is connected to the second connection port (12) which is connected and is open to one side through a straight pipe (52) shown by a two-dot chain line in the drawing. I shall. Further, the third connection port (13) is open to the side facing the second connection port (12), and the fourth connection port (14) is provided upwardly open.
This is a mode in which a cross-shaped passage hole is formed on the whole.

The third and fourth connection ports (13) and (14) are formed by projecting a plug portion to which a general gas hose connection socket is connected, and are normally closed by a spring. The lift valves (13a) and (14a) that are energized by are built in. or,
When using normal gas, that is, the third and fourth connection ports (13) (1
In the unused state of 4), the third and fourth connection ports (13)
The coating caps (17) and (18) are coated on (14), respectively. The covering caps (17) (18) are metal screw plugs that can be screwed into the peripheral wall of the base end of each plug part, and an annular packing (19) for sealing is externally fitted to the base end. It is made to have a configuration. As a result, the third and fourth connection ports (13) and (14) into which the covering caps (17) and (18) are screwed are covered in an airtight state.

These first to fourth connection ports (11) (12) (13) (1
4) is a plug accommodating chamber formed in the approximate center of the pipe joint (1)
The plug body (2) is formed so as to communicate with the plug (10), and the plug body (2) is rotatably housed in the plug storage chamber (10).

The pipe joint (1) has the above-mentioned first to fourth parts.
In addition to the connection ports (11) (12) (13) (14), as shown in FIG.
An operation port (15) for inserting and rotating the stopper (2) into the stopper chamber (20) is formed so as to open toward the front side (right side of the drawing) of the gas meter (M). ing. A female screw portion is formed at the open end of the operation port (15),
In a state where the plug body (2) is housed in the plug housing chamber (20) in a predetermined posture, the closing screw plug (16) equipped with the sealing annular packing (15a) has the operation port (15). The operation port (15) is closed in an airtight state by being screwed into. The closing screw plug (16) is set so that the screw can be loosened and the operation port (15) can be opened only with a special tool.

As shown in FIG. 2, the plug body (2) is formed in a cylindrical shape that can be inserted from the operation port (15), and is located on the side of the closing screw plug (16) when housed. On the surface, a rotation operation part (20) which is a flat cylindrical body is integrally formed so as to project, and as a tool-corresponding part so as to pass through the center of the top surface of the rotation operation part (20). The groove (20a) is the first connection port
It is formed in the same direction as the flow path direction of (11).

In the posture shown in FIG. 1, the plug body (2) is made to communicate with the first connection port (11) opened downward and the second connection port (12) opened to one side. Has a first communication hole (21) penetrating the inside of the stopper (2) in a substantially inverted L shape, and has a groove (22a) formed by cutting the outer peripheral surface of the stopper (2) in the circumferential direction. A second communication hole within a range surrounded by and the peripheral wall of the plug accommodating chamber (10).
(22) is configured, and the third communication port (13) and the fourth connection port (14) communicate with each other through the second communication hole (22).

The posture of the plug body (2) shown in FIGS. 1 and 2 is
This is the first posture, which is the posture during normal gas use. That is, the gas that has passed through the gas meter (M) has a substantially inverted L-shape with the first connection port (11) serving as the upstream end and the second connection port (12) serving as the downstream end, as indicated by the arrow in FIG. Gas main flow path (3
It will be sent indoors through 0). The following is a description based on the construction procedure for gas meter replacement work.

First, before removing the gas meter (M), the cover caps (17) and (18) are removed to remove the third and fourth connection ports.
Sockets (23) and (24) for gas hose connection are connected to (13) and (14) as shown by the chain double-dashed line in FIG. Third,
As described above, since the fourth connection ports (13) and (14) are formed in the shape of the socket connection plug, the forward / backward movement cylinder protruding from the open end of the outer cylinder by the urging force of the spring (not shown). (2
3a) (24a), a push shaft for pushing the lift valves (13a) (14a) inward, a locking ball (neither shown), etc. The sockets (23) and (24) can be detachably attached. When the plug-like portions of the third and fourth connection ports (13) and (14) are inserted into the sockets (23) and (24), the pressing shaft pushes the lift valves (13a) and (14a) inward. hand,
While each plug is opened, the sockets (23) and (24) are attached to the third and fourth connection ports (13) and (14) in a retaining state.

One socket (24) is a gas cylinder.
It is attached to the downstream end of the gas hose (28) connected to (B), and the other socket (23) is connected to the pressure gauge (39) for measuring gas pressure via the gas hose (37). In addition, the gas hose (37) is branched and the third connection port (13)
From the rubber manual pump (49) for sending air from the pipe fitting (1) to the pipe fitting (1) and the open end (48) for bleeding air are also connected via the on-off valves (48a) (49a). I shall.

In this state, the pipe joint (1) is fitted with the closing screw plug (16) located on the front side of the gas meter (M) using a tool.
And open the operation port (15). The operation port (1
Since the rotation operation part (20) of the stopper (2) is located in the back of 5), insert a flat tool (not shown) such as a coin from the operation port (15). , Engaged with the groove (20a),
By rotating the tool in a predetermined direction, the plug body (2) in the plug storage chamber (10) can be rotated in a predetermined direction.

FIG. 3 shows a state in which the plug body (2) is rotated counterclockwise by 90 degrees from the state of FIG. 1, and this is the second posture of the plug body (2). . In this position,
The second connection port (12) and the fourth connection port (14) are the first communication holes.
By communicating via (21), the first auxiliary flow path (31) is configured. Thereby, the first auxiliary channel
The gas from the gas cylinder (B) passes through (31), and as shown by the arrow in the figure, the gas from the fourth connection port (14) to the second connection port (1
It will be sent to 2) and supplied to indoor piping. At the same time, the first connection port (11) and the third connection port (13)
The second auxiliary flow path is connected through the communication hole (22).
(32) will be formed.

After the plug body (2) is in the second posture described above,
To prevent gas leakage, screw the closing screw plug (16) into the operation port (15), and then insert the gas plug (4) of the intake pipe (4).
3) is closed and the gas is shut off on the upstream side of the gas meter (M). Then, the existing gas meter (M) is removed.

By closing the gas plug (43), the gas from the lead-in pipe (4) is shut off, but the gas from the gas cylinder (B) is indoors when the gas from the gas cylinder (B) is used. It will be supplied through (31). Therefore, it is possible to continue to use the gas indoors even during the replacement work of the gas meter.

After the replacement work of the gas meter (M) is completed, the on-off valve (49a) is opened to open the flow passage communicating with the rubber manual pump (49) in the gas hose (37), and the pump (49) is opened.
Then, air is sent into the pipe joint (1) through the third connection port (13), and the pressure gauge (39) is used to perform an air tightness test of the gas meter (M) and the gas meter connection part. After completion of the air tightness test, the on-off valve (49a) is closed. Then, the on-off valve (48a) is opened and the gas plug (43) is opened.

The gas from the intake pipe (4) is pushed from the gas outlet pipe (50) to the first connection port (11) and the second auxiliary flow passage while pushing the air in the newly installed gas meter (M) to the downstream side. (32), third
It flows into the gas hose (37) connected to the socket (23) through the connection port (13), and is discharged from the open end (48) to the outside. It can be confirmed that the air bleeding is completed by the smell of the gas flowing out from the open end portion (48), an ignition test, or the like.

After the air bleeding is completed, the closing screw plug (16) is removed again to open the operation port (15), and the plug body (2) is rotated 90 degrees clockwise to return to the state of FIG. , Restart the gas main flow path (30). Then, the socket (24) is removed from the fourth connection port (14), and the fourth connection port (14) is covered with the covering cap (17). Since the gas supply flow path for indoors is switched from the first auxiliary flow path (31) to the gas main flow path (30), the supply of gas indoors is continuously performed.

Finally, from the third connection port (13) to the socket (23)
And remove the cap and cover the third connection port (13) with the cap (18).
And the gas meter replacement work is completed. In this way, even during the replacement work of the gas meter (M) without stopping the supply of gas indoors, and because the necessary air bleeding confirmation work can be performed only outdoors, even when the housekeeper is absent, The gas meter (M) can be replaced easily and quickly. Further, since it is only necessary to replace the joint connected to the gas outlet pipe (50) with the pipe joint (1) of the embodiment of the present invention, large-scale construction is not required, and the implementation of the present invention can be easily performed. It is possible to change to a gas meter provided with a pipe joint (1) of the form.

As the third and fourth connection ports (13) and (14),
As in the modified example of the embodiment of the present invention shown in FIGS. 4 to 6, normally, screw holes that can be closed in an airtight state with screw plugs are provided, and at the time of gas meter replacement work, the third and fourth connection ports are provided. It is also possible to retrofit the plug part to (13) and (14).

FIGS. 4 and 5 show the case of using a normal gas. FIG. 4 is a sectional view of the pipe joint (1) seen from the front side of the gas meter (M), and FIG. It is the XX sectional view of FIG. 4 which omitted M). FIG. 6 is a cross-sectional view of the pipe joint (1) during the gas meter replacement work.

In the pipe joint (1) of this embodiment, as shown in FIG. 4, the operation port (15) is upward when the first connection port (11) is attached to the gas outlet pipe (50). The plug body (2) is housed in the plug housing chamber (10) from the operation port (15) so that the turning operation part (20) is on the upper side. It The operation port (15) is tightly closed by the closing screw plug (16) as in the case of the first embodiment.

The first communication hole (21) formed in the plug body (2) is
The second communicating hole (22) is formed in a substantially inverted L shape that is open to the bottom and the peripheral surface of the stopper (2), and the second communicating hole (22) is the same as in the first embodiment described above. ) Is formed in a circumferentially cut state on the peripheral surface.

Further, as shown in FIG. 5, the third and fourth connection ports (13) and (14) are screw holes provided so as to be opened on the front side and the back side of the gas meter (M), respectively. When not in use (when using normal gas), the screw plugs (33) and (34) are screwed in such a manner as to press the annular packing (35) for sealing, and are sealed in an airtight state. Has become. In this state, the gas sent into the gas meter (M) passes through the first communication hole (21) and is sent to the straight pipe (52) following the indoor pipe.

When replacing the gas meter (M), the screw plugs (33) (34) are removed and the third and fourth connection ports (13) are removed.
As shown in FIG. 6, the screw shaft portion (43a) (44
The plug parts (25) and (26) provided with a) are screwed and connected. At this time, since the tip ends of the screw shaft portions (43a) (44a) press the annular packing (35), the plug portion (25)
(26) will be attached to the outer peripheral airtight state. Sockets (23) and (24) are connected to the plug parts (25) and (26), respectively, and the plug parts (43) are similar to the case of the above-described embodiment.
Is communicated with the pressure gauge (39), the manual pump (49), etc., and the plug portion (44) is communicated with the gas cylinder (B).

After connecting sockets (23) (24), pipe fitting (1)
The closure screw plug (16) screwed on the top surface of the plug is removed, and a tool is engaged with the rotary operation part (20) of the plug (2) to rotate it clockwise about 90 degrees. This state is the second posture shown in FIG. 6, and the gas from the gas cylinder (B) is the second posture of the stopper (2).
Through the communication hole (22), the fourth connection port (14) to the second connection port (1
It will be sent to 2) and supplied indoors. Further, the first connection port (11) and the third connection port (13) communicate with each other through the first communication hole (21).

After that, the work may be carried out in the same procedure as in the case of the above-mentioned first embodiment. After the replacement of the gas meter (M), the pressure gauge (39), the manual pump (49) and the Airtightness inspection and air bleeding are performed using the air bleeding open end portion (48), and then the plug body (2) is returned to the first position shown in FIG. Then remove the plugs (25) and (26) and screw in (3
3) The work is completed by screwing (34) together. Of course, the operation port (15) is also closed by screwing the blocking plug (16).

In the second embodiment, the plug portion does not protrude from the third and fourth connection ports (13) and (14) during normal use of the gas, so that the pipe joint under normal conditions is used. Not only is the appearance of (1) cleaner, but it is also possible to prevent accidental mischief.

[Brief description of drawings]

FIG. 1 is a partially enlarged cross-sectional view showing a state in which a pipe joint according to a first embodiment of the present invention is connected to an outlet pipe of a gas meter, showing a state where a gas meter is viewed from the front when normal gas is used. The case is shown.

2 is a partially enlarged cross-sectional view of the pipe joint of FIG. 1 as viewed from the left side surface.

FIG. 3 is a partially enlarged cross-sectional view showing a state in which the pipe joint according to the first embodiment of the present invention is connected to an outlet pipe of a gas meter, in the case where a gas meter is being replaced in a state where the gas meter is viewed from the front. Is shown.

FIG. 4 is a partially enlarged cross-sectional view showing a state in which the pipe joint of the second embodiment of the present invention is connected to an outlet pipe of a gas meter, showing a state where the gas meter is viewed from the front when normal gas is used. The case is shown.

5 is a cross-sectional view taken along line XX of FIG. 4 in which a gas meter portion is omitted.

FIG. 6 is a transverse cross-sectional view of the pipe joint of the second embodiment of the present invention during the gas meter replacement work.

FIG. 7 is a front view showing a piping structure of a conventional gas meter.

[Explanation of symbols]

(1) ・ ・ ・ ・ ・ Piping fitting (10) ・ ・ ・ ・ ・ Spigot chamber (11) (12) (13) (14) ・ ・ ・ ・ First, second, third, fourth connection port (2) ・ ・ ・ Plug (21) (22) ・ ・ ・ First and second communication holes (30) ・ ・ ・ ・ ・ Main gas flow path (31) (32) ... First and second auxiliary flow paths (5) ・ ・ ・ ・ ・ Feed pipe (50) ・ ・ ・ ・ ・ Gas outlet pipe (M) ・ ・ ・ ・ ・ Gas meter

Claims (5)

[Claims] 1. A pipe joint connected to a gas outlet pipe of a gas meter, the first connecting port being connected to the gas outlet pipe of the gas meter, and the second connecting port being connected to a feed pipe for feeding gas indoors. When,
A third connection port to which the gas pressure inspection tool is connected and a fourth connection port for the auxiliary circuit are formed so as to respectively communicate with the plug accommodating chamber, and the plug accommodating chamber communicates between these connection ports. A plug body for shutting off is rotatably housed, and the plug body is formed with two first and second communication holes that are in a non-communication state with each other, and the plug body is When the plug body is in the first position, the first connection port and the second connection port can switch the first communication hole from the first position to the second position according to the rotation. A gas main flow path is configured by being communicated with each other, and when the plug body is in the second posture, the gas main flow path is blocked, and the first connection port and the third connection port are the third connection port. The first auxiliary flow path is configured by communicating through either one of the first and second communication holes. At the same time, the second connection port and the fourth connection port are communicated with each other through the other one of the first and second communication holes, whereby the second connection port is connected to the second connection port.
A pipe joint characterized in that the auxiliary flow path is configured to be configured. 2. The pipe joint according to claim 1, wherein the first communication hole is configured to penetrate through the plug body, and the second communication hole surrounds an outer peripheral surface of the plug body. A pipe joint that is a groove formed by being cut in the same direction. 3. The pipe joint according to claim 1 or 2, wherein an operation port for rotating the plug body is opened in the plug accommodating chamber, and the operation port is the plug. A pipe joint configured to be closed in an airtight state by a removable plug provided in a state where a body is stored in a predetermined posture in the plug storage chamber. 4. The pipe joint according to any one of claims 1 to 3, wherein the third and fourth connection ports are connection tube parts to which gas hoses can be detachably connected, and the connection tube when not in use. The part is a pipe joint that is covered in an airtight state by a closing cap. 5. The pipe joint according to any one of claims 1 to 3, wherein the third and fourth connection ports are connection tube parts to which gas hoses can be detachably connected, and the connection tube parts are not used. Pipe fittings that are sometimes removable.