JP2019032205A - Joint unit for gas meter - Google Patents

Abstract

To enhance security against stealing of gas in a joint unit for a gas meter.SOLUTION: A joint unit A includes an inlet-side connection pipe 10, an outlet-side connection pipe 20, and a by-pass pipe 30. Lead-in ports of a primary gas pipe G1 and a gas meter M are connected to the connection pipe 10, and a lead-out port of the meter M and a secondary gas pipe G2 are connected to the connection pipe 20. The bypass pipe 30 connects between the connection pipe 10 and the connection pipe 20 in communication. A switching valve 40 of the connection pipe 10 is switched to a three-way open state in which the gas pipe G1, the meter M and the by-pass pipe 30 are placed in communication with one another and a by-pass state in which the gas pipe G1 is placed in communication with the by-pass pipe 30. A second switching valve 50 of the connection pipe 20 is switched to an open state in which the meter M is placed in communication with the gas pipe G2 and a by-pass state in which the by-pass pipe 30 is placed in communication with the gas pipe G2. The by-pass pipe 30 is provided with a by-pass switching valve 60 for placing the by-pass pipe 30 into communication and cutting it off.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a joint unit for a gas meter capable of exchanging a gas meter without stopping gas supply to a gas device.

  Previously, when the gas meter was replaced, the gas main plug on the upstream side of the gas meter was closed to stop the gas supply to the gas meter and the secondary gas pipe connected to the gas equipment. For this reason, it was not possible to use gas equipment during the replacement of the gas meter. Therefore, as shown in Patent Document 1, a joint unit for a gas meter has been developed in which a gas meter can be replaced while using a gas device.

The joint unit for gas meter of Patent Document 1 includes an inlet side connecting pipe in which a primary gas pipe is connected to an upstream end and an inlet of a gas meter is connected to a downstream end, and a gas meter is connected to an upstream end. The outlet side connection pipe to which the outlet port is connected and the secondary side gas pipe is connected to the downstream end portion, and the bypass pipe that communicates the inlet side connection pipe and the outlet side connection pipe are provided.
The inlet side connecting pipe is provided with a first switching valve at an intersection with the bypass pipe. The first switching valve is in an open state in which the primary gas pipe and the gas meter are in communication with each other, and the primary gas. It is possible to switch to a three-way open state in which the pipe, the gas meter, and the bypass pipe communicate with each other, and a bypass state in which the primary gas pipe and the bypass pipe communicate with each other.
The outlet connection pipe is provided with a second switching valve at an intersection with the bypass pipe, and the second switching valve is in an open state in which the gas meter and the secondary gas pipe communicate with each other, and the bypass pipe Can be switched to a bypass state in which the secondary gas pipe communicates.

JP 2000-275080 A

  Although the joint unit for gas meter of patent document 1 is provided with the bypass pipe which connects an entrance side connection pipe and an exit side connection pipe, it can replace a gas meter, without stopping supply of gas to gas equipment, Since the gas can be supplied to the gas equipment without going through the gas meter, the gas may be stolen.

In order to solve the above problems, the joint unit for a gas meter of the present invention includes an inlet side connecting pipe having a primary gas pipe connected to the upstream end and an inlet of the gas meter connected to the downstream end, An outlet side connecting pipe having a gas meter outlet connected to the upstream end and a secondary gas pipe connected to the downstream end, and a bypass communicating the inlet side connecting pipe and the outlet side connecting pipe A tube.
The inlet side connecting pipe is provided with a first switching valve at an intersection with the bypass pipe, and the first switching valve is in a three-way open state in which at least the primary side gas pipe, the gas meter, and the bypass pipe communicate with each other. , And a bypass state in which the primary gas pipe and the bypass pipe are communicated with each other.
The outlet side connecting pipe is provided with a second switching valve at an intersection with the bypass pipe, and the second switching valve is at least in an open state in which the gas meter and the secondary side gas pipe communicate with each other, and the bypass pipe Can be switched to a bypass state in which the secondary gas pipe communicates.
In a normal use state of the gas meter joint unit, gas flows from the primary side gas pipe to the secondary side gas pipe through the inlet side connecting pipe, the gas meter, and the outlet side connecting pipe.
The bypass pipe is provided with a bypass switching valve. The bypass switching valve can be switched between an open state for communicating the bypass pipe and a closed state for blocking the bypass pipe.

  According to the said structure, by providing a bypass switching valve in a bypass pipe, a bypass pipe can be interrupted | blocked and the safety | security with respect to gas theft can be ensured.

Preferably, the bypass switching valve is provided with non-switchable means for making the switching impossible.
According to the said structure, the safety | security with respect to a gas theft can be improved by making it impossible to switch from a closed state to an open state in a bypass switching valve by a switch impossible means.

Preferably, the first switching valve is provided with first locking means for preventing switching from the normal use state so as to narrow the flow path to the gas meter side while securing the flow path to the bypass pipe. ing.
According to the said structure, by providing a 1st locking means in a 1st switching valve, the countermeasure against a gas theft can be performed in a superimposed manner and the safety with respect to a gas theft can further be improved.

Preferably, the first lock means has a first release portion that releases switching prevention by pressing, and the first release portion has the pressing portion exposed to the outside, and is in the normal use state. The pressing portion of the first release portion faces the bypass switching valve and faces the bypass switching valve at a close distance.
According to the above configuration, in the normal use state, the bypass switching valve becomes a barrier and prevents the first release portion of the first locking means from being pressed, and therefore it is difficult to cancel the switching prevention of the first switching valve. Become. That is, it becomes difficult to narrow the flow path to the gas meter side while securing the flow path to the bypass pipe. Therefore, measures against gas theft can be performed in a superimposed manner, and safety can be further increased.

Preferably, the bypass switching valve is detachably attached with an operating tool for switching between the closed state and the open state, and the bypass switching valve is switched from the closed state to the open state by the operating tool. Then, the operating instrument presses the pressing portion of the first release portion to release the switching prevention of the first switching valve.
According to the above configuration, the use of the operating instrument can simultaneously switch the bypass switching valve from the closed state to the open state and cancel the switching prevention of the first switching valve. Therefore, when the gas is passed through the bypass pipe for a valid reason such as replacement of the gas meter, the operability of the gas flow path switching operation can be improved.

Preferably, the second switching valve is provided with second locking means for preventing switching from the open state to the bypass state.
According to the said structure, by providing a 2nd locking means in a 2nd switching valve, the countermeasure against a gas theft can be performed in a superimposed manner and the safety with respect to a gas theft can further be improved.

Preferably, the second switching valve is provided with second locking means for preventing switching from the open state to the bypass state, and the second locking means includes a second release portion for releasing the switching prevention by pressing. The second release portion has a pressing portion exposed to the outside at least when the second switching valve is in an open state, and the bypass switching valve is switched from a closed state to an open state by the operating instrument. Then, the operating instrument presses the pressing portion of the second release portion to release the switching prevention of the second switching valve.
According to the above configuration, when the bypass switching valve is switched from the closed state to the open state by using the operating tool, not only the first switching valve but also the switching prevention of the second switching valve can be simultaneously released. . Therefore, the operability of the gas channel switching operation can be further improved.

Preferably, the second locking means has a second release portion that releases the switching prevention by pressing, and the second release portion is a pressing portion that is exposed to the outside at least when the second switching valve is open. The bypass switching valve is detachably mounted with an operating tool for switching between the closed state and the open state, and the bypass switching valve is switched from the closed state to the open state by the operating tool. Then, the operating instrument presses the pressing portion of the second release portion to release the switching prevention of the second switching valve.
According to the above configuration, it is possible to simultaneously switch the bypass switching valve from the closed state to the open state and cancel the switching prevention of the second switching valve by using the operating tool. Therefore, the operability of the gas flow path switching operation can be improved.

Preferably, the second switching valve is rotatably accommodated in a second valve accommodating portion formed at the intersection of the outlet side connecting pipe and the bypass pipe, and the second valve accommodating portion. A second valve body that switches between the open state and the bypass state of the second switching valve by communicating and blocking the side connection pipe and the bypass pipe, and is provided in the second valve body and exposed from the second valve housing portion A second valve operating portion that enables the switching operation of the second valve body, and the second release portion of the second locking means is within the second valve operating portion with respect to its rotational axis. When the second valve body is provided in an orthogonal direction and the second switching body is in the open position of the second switching valve, the pressing portion of the second release portion is formed facing downward to the second valve housing portion. It is exposed from the opening.
According to the above configuration, since the opening formed in the second valve housing portion is exposed downward to expose the pressing portion of the second release portion of the second locking means, rainwater enters the second valve housing portion. It has become difficult.

Preferably, the bypass switching valve is rotatably accommodated in a bypass valve accommodating portion formed in the bypass pipe and the bypass valve accommodating portion, and the bypass switching valve is opened and closed by communicating and blocking. A bypass valve body that switches between a closed state and a closed state, and a bypass valve operating portion that is provided in the bypass valve body and that is exposed from the bypass valve housing portion and allows the switching operation of the bypass valve body. As a disabling means, a cover that covers the bypass valve operation part and disables the operation is attached to the bypass valve housing part.
According to the above configuration, since the bypass valve operating portion is covered with the cover, the bypass switching valve cannot be directly operated, and the safety against gas theft can be improved.

Preferably, the cover is formed with an operation window hole penetrating the outside and the inside thereof, and an attachment portion of an operation tool for operating the bypass valve operation unit can be inserted into the operation window hole, and the bypass The valve operating part has an attached part to which the attaching part of the operating instrument is attached.
According to the above configuration, when the gas is passed through the bypass pipe for a valid reason such as replacement of the gas meter, the bypass switching valve can be opened by using the operating tool.

Preferably, the cover is fixed in position to the bypass valve housing portion, the attached portion of the bypass valve operation portion is formed in a non-circular shape, and the attachment portion of the operating instrument includes a shaft portion and a tip portion of the shaft portion A non-circular deformed portion formed on the mounting portion and a non-circular tip locking portion locked to the attached portion, and the deformed portion of the operating instrument and the operation window hole of the cover are similar to each other. When the bypass valve body is in the closed position of the bypass switching valve and has a cross-sectional shape, the deformed portion of the operation instrument is inserted into and extracted from the operation window hole, and the distal end locking portion of the operation instrument is inserted. Can be engaged with and disengaged from the attached portion of the bypass valve operating portion.
According to the above configuration, since the operating tool can be attached to and detached from the bypass switching valve only when the bypass switching valve is closed, the bypass switching valve is always closed when the operating tool is removed. Forgetting to close the bypass switching valve can be prevented.

Preferably, the cover has a bottom portion and is formed in a cylindrical shape, the operation window hole is formed in the bottom portion, the rotation axis of the bypass valve body and the bypass valve operation portion, and the axis of the cover are: A groove extending in the horizontal direction and extending downward from the operation window hole and penetrating through the bottom is formed at the bottom of the cover.
According to the said structure, even if rainwater permeates into the inside of a cover, rainwater can be discharged | emitted from a groove part.

  Preferably, the bypass switching valve is rotatably accommodated in a bypass valve accommodating portion formed in the bypass pipe and the bypass valve accommodating portion, and the bypass switching valve is opened and closed by communicating and blocking. A bypass valve body that switches between a closed state and a closed state, and a bypass valve operating portion that is provided in the bypass valve body and that is exposed from the bypass valve housing portion and allows the switching operation of the bypass valve body. The disabling means has a fixing means for fixing the bypass valve body to the shut-off position of the bypass pipe by fixing the bypass valve operating part to the bypass valve housing part.

  According to the present invention, safety against gas theft can be improved.

It is a figure which shows the normal use state of the coupling unit for gas meters which concerns on 1st Embodiment of this invention, (A) is a left view, (B) is a front view, (C) is a right view. (A) is a principal part enlarged front view of the joint unit in a normal use state with the first switching valve in the three-way open state, the second switching valve in the open state, and the bypass switching valve in the closed state. (B) is a figure which shows the cross section which notched a part along the IIR-IIR line | wire of FIG.1 (C) in FIG.2 (A) along the IIL-IIL line | wire of FIG.1 (A). is there. It is a principal part enlarged front view of the joint unit of the normal use state which attached the operating instrument to the bypass switching valve. It is a partial sectional view similar to FIG. 2 (B) of the joint unit showing that the bypass switching valve is opened by the operating instrument. FIG. 3 is a partial cross-sectional view similar to FIG. 2B of the joint unit showing a state in which the first switching valve in the three-way open state is switched to narrow the flow path toward the gas meter. It is a partial sectional view similar to FIG. 2 (B) of the joint unit showing that the second switching valve is in a bypass state. It is a partial sectional view similar to FIG. 2 (B) of the joint unit showing that the first switching valve is in a bypass state. (A) It is a disassembled perspective view of a bypass switching valve. (B) It is a perspective view which shows the external appearance of a bypass switching valve. (A) It is a principal part expanded front view of the joint unit shown in the state which isolate | separated the handle member of the operating instrument, the cancellation | release metal fitting, and the bypass switching valve. (B) It is a perspective view of the handle member. (A) It is sectional drawing which follows the XA-XA line | wire of FIG. (B) It is sectional drawing which follows the XB-XB line | wire of FIG. 10 (A). (C) It is sectional drawing which follows the XC-XC line | wire of FIG. It is sectional drawing which follows the XI-XI line of FIG. It is a flow chart of the joint unit, (A) shows a normal use state of the joint unit, corresponds to FIGS. 1 to 3, (B) is a state in which the bypass valve is opened from the state of (A) 4 corresponds to FIG. 4, and FIG. 5C illustrates a state where the first switching valve is switched from the state of FIG. 5B so as to narrow the flow path to the gas meter side, and corresponds to FIG. 5. It is a flow chart of the joint unit, (A) shows the state where the 2nd change-over valve was changed from the state of Drawing 12 (C) to the state where the bypass pipe and the secondary side gas pipe were connected, 6 corresponds to FIG. 6, (B) shows the state where the first switching valve is switched from the state (A) to the bypass state, corresponds to FIG. 7, and (C) shows the exchange state of the gas meter, corresponding to FIG. doing. It is a flow chart of the joint unit, (A) shows the state of an airtight inspection of a newly installed gas meter, and corresponds to FIG. 7, (B) shows the state of air purge of the newly installed gas meter. This corresponds to FIG. (A) is a partial cross-sectional view similar to FIG. 2 (B) of the joint unit, showing that the first switching valve is in a state where the primary side gas pipe is shut off from the gas meter and the bypass pipe. (B) is a flow chart of the joint unit corresponding to (A). (A) It is an equivalent figure of Drawing 10 (A) which shows a bypass change valve of a joint unit for gas meters concerning a 2nd embodiment of the present invention. (B) It is a perspective view of the handle member of the operating instrument concerning the embodiment. (A) It is a principal part expansion front view which shows the bypass switching valve of the coupling unit for gas meters which concerns on 3rd Embodiment of this invention. (B) It is sectional drawing of the bypass switching valve concerning the embodiment, Comprising: The state fixed with the screw in the closed state is shown.

[First Embodiment]
Hereinafter, a gas meter coupling unit according to a first embodiment of the present invention will be described with reference to FIGS. The gas meter coupling unit A of this embodiment includes an inlet side connecting pipe 10, an outlet side connecting pipe 20, and a bypass pipe 30 that connects the inlet side connecting pipe 10 and the outlet side connecting pipe 20.

(Inlet side connection pipe)
As shown in FIGS. 1A and 1B, the inlet side connecting pipe 10 is formed in a straight line shape, and a primary side gas pipe G1, for example, a steel pipe, is connected to the upstream end 11. Is done. An inlet of the gas meter M is connected to the downstream end 12 by a connection nut 12a.

(First switching valve)
As shown in FIG. 2A, the inlet side connection pipe 10 is provided with a first switching valve 40 at the intersection 13 with the bypass pipe 30. The first switching valve 40 communicates and blocks the primary side gas pipe G1 with the gas meter M and the bypass pipe 30.
As shown in FIGS. 1 (A) and 2 (B), the first switching valve 40 is rotatably accommodated in the valve accommodating portion 14 formed in the intersection 13 and the valve accommodating portion 14 so as to rotate. A first valve body 41 (schematically shown in FIGS. 12 to 14 and 15B) whose axis is oriented in the horizontal direction, and connected to the first valve body 41 to operate the first valve body 41 And a first valve operating portion 42 which is a bottomed cylindrical knob. The first valve operating portion 42 seals the valve accommodating portion 14 from the front in a rotatable state.

The switching of the flow path of the joint unit A by the first switching valve 40 will be described.
When the first valve operating section 42 is at the position shown in FIG. 2, the first switching valve 40 is in a three-way open state (FIG. 12A) that allows the primary side gas pipe G <b> 1, the gas meter M, and the bypass pipe 30 to communicate with each other. When the first valve operating section 42 is rotated 45 degrees counterclockwise from this state (FIG. 5), the flow path to the bypass pipe 30 is secured while the gas meter M side is secured as shown in FIG. The flow path becomes narrower. Further, when rotated to 90 degrees (FIG. 7), as shown in FIG. 13 (B), the first switching valve 40 enters a bypass state in which the primary gas pipe G1 and the bypass pipe 30 are communicated.

  When the first valve operating section 42 is rotated 90 degrees clockwise from the position shown in FIG. 2 (FIG. 15A), the first switching valve 40 is moved to the primary side gas pipe as shown in FIG. 15B. G1 is closed with respect to the gas meter M and the bypass pipe 30.

(First locking means)
As shown in FIG. 2B, the first switching valve 40 is provided with locking means L1 (first locking means) for preventing the switching.
The lock means L1 has a lock pin 43 (first release portion). The lock pin 43 is mounted on the first valve operating portion 42 so as to be movable in a direction perpendicular to the rotation axis thereof, and is always urged radially outward of the first valve operating portion 42 by the spring 44 in a retaining state. Has been. The lock pin 43 has a head portion 43a (pressing portion) at the outer end and a constricted portion 43b with a small diameter at the intermediate portion. The head 43a is exposed from the side surface of the first valve operating section 42, and when the first switching valve 40 shown in FIG. 2B is in a three-way open state (FIG. 12A), the axis of the bypass pipe 30 Direction, facing the outlet side connecting pipe 20 side.

  As shown in FIG. 2B, a restriction recess 14 a that restricts the movement of the lock pin 43 in the circumferential direction of the first valve operation portion 42 is provided in the opening of the valve accommodating portion 14. The regulating recess 14a has a circumferential length slightly longer than 180 degrees. The regulating recess 14a is provided with an arc wall portion 14b in the circumferential direction from one end portion in the circumferential direction and an arc wall portion 14c at a position away from the arc wall portion 14b. A locking recess 14d is formed between the arcuate wall portions 14b and 14c.

The operation of the lock means L1 having the above configuration will be described.
As shown in FIG. 2, when the first valve operating portion 42 is in the three-way open position of the first switching valve 40, the lock pin 43 comes into contact with the arc wall portion 14c as shown in FIG. Therefore, the first valve operation unit 42 cannot be rotated counterclockwise. That is, the first switching valve 40 is prevented from switching so as to narrow the flow path to the gas meter M side. As shown in FIG. 4, when the lock pin 43 is pushed inward in the radial direction of the first valve operating portion 42, the constricted portion 43b of the lock pin 43 enters the position of the arc wall portion 14c. In this state, the constricted portion 43b can straddle the circular arc wall portion 14c, so that the first valve operating portion 42 can be rotated counterclockwise.

  When the first valve operating part 42 is rotated 45 degrees counterclockwise from the position shown in FIGS. 2 to 4, the lock pin 43 is positioned in the locking recess 14d as shown in FIG. 5, and the first valve operating part The head 43a protrudes from the side surface of the first valve operating portion 42. The lock pin 43 comes into contact with the arcuate wall portions 14b and 14c and cannot turn the first valve operating portion 42, and the first switching valve 40 is prevented from switching.

When the constricted portion 43b is positioned up to the arc wall portions 14b and 14c by pushing the head portion 43a, the contact between the lock pin 43 and the arc wall portions 14b and 14c is released, and the first valve operating portion 42 can be rotated. become. When the first valve operating portion 42 is further rotated 45 degrees counterclockwise to enter the bypass state shown in FIG. 7, the lock pin 43 abuts against one end portion of the restricting recess 14a. 42 can not be turned.
Further, when the first valve operating portion 42 is rotated 90 degrees clockwise from the three-way open state of the first switching valve 40 shown in FIG. 2 to the closed state shown in FIG. Since it contacts the end portion, the first valve operating portion 42 cannot be rotated any further.

(Closed lock means)
As shown in FIG. 15A, the first switching valve 40 is provided with a lock means LC (closed lock means) for fixing the closed state.
The locking means LC has a screw 45 (see FIG. 2A) provided in the first valve operating portion 42 in parallel with the rotation axis. The screw 45 is screwed into a screwing portion (not shown) embedded in the first valve operation unit 42 and can advance and retreat. When the first valve operating portion 42 is in the closed position of the first switching valve 40 shown in FIG. 15A, the screw 45 is positioned at the position of the engaging recess 14e formed in the opening of the valve accommodating portion 14. It fits and fits into the engaging recess 14e by screwing. Thereby, the 1st valve operation part 42 cannot be turned, and the 1st switching valve 40 is fixed in a closed state by extension.

(Exit side connection pipe)
As shown in FIGS. 1B and 1C, the outlet side connecting pipe 20 is formed in a straight line like the inlet side connecting pipe 10, and the upstream end 21 is guided to the gas meter M. The outlet is connected by a connection nut 21a. The downstream end 22 is connected to a secondary gas pipe G2, for example, a steel pipe. The secondary side gas pipe G2 communicates with a gas device (not shown).
In the outlet side connection pipe 20, a pressure detection hole 21 b for attaching a pressure detection plug P is formed between the intersection 23 with the bypass pipe 30 and the upstream end 21.

(Second switching valve)
As shown in FIG. 2A, the outlet side connecting pipe 20 is provided with a second switching valve 50 at the intersection 23 with the bypass pipe 30. The second switching valve 50 communicates and blocks the secondary side gas pipe G2 with respect to the gas meter M and the bypass pipe 30.
As shown in FIG. 2 (B), the second switching valve 50 is rotatably accommodated in the second valve accommodating portion 24 formed in the intersecting portion 23 and the valve accommodating portion 24, and the rotation axis is set in the horizontal direction. A second valve body 51 (schematically shown in FIGS. 12 to 14 and 15B) and a bottomed cylinder connected to the second valve body 51 for operating the second valve body 51 And a second valve operating portion 52 that is a shaped knob. The second valve operation part 52 seals the valve housing part 24 from the front in a rotatable state.

The switching of the flow path of the joint unit A by the second switching valve 50 will be described.
When the 2nd valve operation part 52 is a position of FIGS. 2-5, the 2nd switching valve 50 exists in the open state (FIG. 12) which connects the gas meter M and the secondary side gas pipe G2. From this state, when the second valve operating unit 52 is rotated 90 degrees counterclockwise (FIG. 6), the second switching valve 50 includes the bypass pipe 30 and the secondary gas pipe as shown in FIG. A bypass state is established that allows G2 to communicate. The gas meter M, the bypass pipe 30 and the secondary gas pipe G2 are in fluid communication between the open state and the bypass state of the second switching valve 50. Therefore, the gas flow path is not blocked when the second switching valve 50 is switched between the open state and the bypass state.

(Second locking means)
As shown in FIG. 2B, the second switching valve 50 is provided with locking means L2 (second locking means) for preventing the switching.
The locking means L2 has a lock pin 53 (second release portion). The lock pin 53 is mounted on the second valve operation unit 52 so as to be movable in a direction perpendicular to the rotation axis thereof, and is always urged radially outward of the second valve operation unit 52 by a spring 54 in a retaining state. Has been. The lock pin 53 has a tip 53a (pressing portion) at the tip in the outer direction.

  As shown in FIGS. 2B and 6, a restriction recess 24 a that restricts the movement of the lock pin 53 in the circumferential direction of the second valve operation portion 52 is formed in the lower portion of the cylindrical wall portion near the opening of the valve housing portion 24. Is provided. The regulating recess 24a has a circumferential length slightly longer than 90 degrees. An opening 24b penetrating the wall portion of the valve accommodating portion 24 is formed at the end of the regulating recess 24a in the circumferential direction on the bypass pipe 30 side. When the second switching valve 50 is in the open state shown in FIG. 2B (FIG. 12A), the tip 53a of the lock pin 53 is exposed to the outside from the opening 24b.

The operation of the lock means L2 having the above configuration will be described.
As shown in FIG. 2, when the second valve operating section 52 is in the open position of the second switching valve 50, the lock pin 53 is engaged with the opening 24b as shown in FIG. Therefore, the second valve operation unit 52 cannot be turned. That is, the second switching valve 50 is prevented from switching from its open state to the bypass state.
As shown in FIG. 4, the second valve operating portion 52 can be turned by pushing the tip 53a of the lock pin 53 into the restricting recess 24a. At this time, since the lock pin 53 contacts the one end portion of the restricting recess 24a clockwise, the second valve operating portion 52 cannot be rotated.

  When the second valve operating portion 52 is rotated 90 degrees counterclockwise from the position shown in FIGS. 2 to 5 to enter the bypass state shown in FIG. 6, the lock pin 43 comes into contact with the other end of the restricting recess 24a. Therefore, the second valve operation unit 52 cannot be turned any more.

(Bypass pipe and bypass switching valve)
As shown in FIG. 2A, the bypass pipe 30 connects the intersecting portion 13 of the inlet side connecting pipe 10 and the intersecting portion 23 of the outlet side connecting pipe 20 in a straight line. The bypass pipe 30 is provided with a bypass switching valve 60 at a position near the inlet-side connecting pipe 10 to connect and block the bypass pipe 30.

As shown in FIGS. 8 and 10, the bypass switching valve 60 includes a bypass valve housing portion 31 formed in the bypass pipe 30, a bypass valve body 61, and a bypass valve operation portion 62 for operating the bypass valve body 61. And have.
The bypass valve accommodating part 31 has a branch cylinder part 32 protruding in a direction orthogonal to the bypass pipe 30, accommodates the bypass valve body 61 in a rotatable manner, and the rotational axis is directed in the horizontal direction (FIG. 10). (B)). The bypass valve body 61 communicates and blocks the bypass pipe 30 by rotation. A bypass valve operating section 62 for operating the bypass valve body 61 is attached.

The bypass valve operation unit 62 includes a first drive shaft 62a connected to the bypass valve body 61 and a second drive shaft 62x. The first drive shaft 62a has a connecting concave portion 62b in which an oval concave portion is formed, and the second drive shaft 62x has a connecting convex portion 62y that is an oval convex portion, and is connected to the connecting concave portion 62b. The part 62y is connected.
A mounting portion 62z having a saddle hole shape (double hole having a small circle portion and a large circle portion) is formed on the top surface of the second drive shaft 62b, and an operation tool 70 to be described later is attached thereto. As shown in FIG. 10A, the second drive shaft 62 x protrudes from the branch cylinder portion 32.

  A spring 63 is interposed between the bypass valve body 61 and the first drive shaft 62a, and urges the first drive shaft 62a in the opening direction of the branch cylinder portion 32. An annular stopper 64 and a C-shaped locking ring 65 are attached at a position between the first drive shaft 62 a and the second drive shaft 62 b in the branch cylinder portion 32.

  The stopper 64 is locked to notches 32a and 32a formed to be spaced apart from each other in the diameter direction of the branch cylinder portion 32, and has two convex portions 64a on the inner periphery, and the first drive shaft 62a is formed on these convex portions 64a. When the connecting recess 62b comes into contact, the rotation of the drive shaft 62a is restricted to 90 degrees. The locking ring 65 is fitted in a groove formed in the branch cylinder portion 32 and serves to prevent the first drive shaft 62 a and the stopper 64 that are biased by the spring 63 from coming off.

(Bypass valve operation unit cover)
A bottomed cylindrical cover 66 is attached to the branch cylinder part 32 of the bypass valve accommodating part 31 to disable the operation of the drive shaft 62b which is the bypass valve operation part 62. A C-shaped ring 67 is interposed between the cylindrical portion 66a of the cover 66 and the branch cylindrical portion 32, so that the axial movement of the cover 66 is stopped and a waterproof packing 68 is interposed to prevent water from entering. An accommodation recess 66c is formed in the bottom 66b of the cover 66, and the second drive shaft 62x is rotatably accommodated with a waterproof O-ring 69 interposed.

The alignment pin 32c is fitted into the fitting hole 32b on the opening end surface of the branch cylinder part 32 and the fitting hole 66d on the bottom part 66b of the cover 66, so that the cover 66 is prevented from rotating in the circumferential direction.
On the bottom 66b of the cover 66, a mandrel-shaped operation window hole 66e for allowing an operation instrument 70 described later to pass therethrough is formed. The operation window hole 66e is formed in a similar shape to the attached portion 62z formed in the second drive shaft 62x. The bottom 66b of the cover 66 is formed with a water draining groove 66f that extends downward from the large circle of the operation window hole 66e and penetrates the bottom 66b.

  As shown in FIG. 10A, when the bypass valve body 61 is blocking the bypass pipe 30, when viewed from the rotational axis direction of the bypass valve body 61, the operation window hole 66 e of the cover 66 and the second Both the mounted portions 62z of the drive shaft 62x are arranged so that the small circular portions overlap in the same direction.

The switching of the flow path of the joint unit A by the bypass switching valve 60 will be described.
As shown in FIG. 2, the bypass switching valve 60 is in a closed state in which the bypass valve body 61 blocks the bypass pipe 30 as shown in FIG. 12A when the operating instrument 70 is not attached. . When the bypass valve operating section 62 is rotated 90 degrees counterclockwise from this closed state, as shown in FIG. 12 (B), the bypass valve body 61 causes the bypass pipe 30 to communicate, and the bypass switching valve 60 is opened. Become.

(Operating equipment)
As shown in FIGS. 3 to 7, an operating tool 70 is used to operate the second drive shaft 62 x covered with the cover 66. As shown in FIG. 9A, the operating instrument 70 includes a handle member 71 and a release fitting 72.
As shown in FIG. 9B, the handle member 71 has a gripping portion 71a and an attachment portion 71b on the opposite side. The attachment portion 71b has a cylindrical shaft portion 71c, and has a proximal end locking portion 71d and a distal end locking portion 71e (deformed portion) at the proximal end portion and the distal end portion, respectively. Both the base end locking portion 71d and the distal end locking portion 71e are formed in a double circle shape with a small circular portion protruding from the shaft portion 71c in the radial direction. The front end locking portion 71e has substantially the same cross-sectional shape as the operation window hole 66e of the cover 66 and the attached portion 62z of the bypass valve operation portion 62, and has a similar shape.

In the handle member 71, a first pressing portion 71x protrudes in a direction orthogonal to the axes of the gripping portion 71a and the mounting portion 71b. The tip of the first pressing portion 71x has a curved surface, and the portion on the mounting portion 71b side of the first pressing portion 71x is a receiving portion 71y cut out larger than the cover 66, and the handle member 70 is removed. When attached to the bypass switching valve 60, interference with the cover 66 is avoided.
The release fitting 72 is formed in a plate shape, has a keyhole-shaped notch 72a at the base end, and has a protruding second pressing portion 72x at the tip.

(Installation and removal of operation equipment)
In order to attach the operating instrument 70 to the bypass switching valve 60, as shown in FIG. 9 (A), the base end locking portion 71d of the handle member 71 and the notch portion 72a of the release fitting 72 are aligned, and the base end The locking part 71d is locked to the notch part 72a. Further, as shown in FIG. 10A, the distal end locking portion 71e of the handle member 71 is inserted into the operation window hole 66b of the cover 66 of the bypass switching valve 60, and is engaged with the mounted portion 62z of the second drive shaft 62x. When combined, the operating instrument 30 is attached to the bypass switching valve 60 as shown in FIG. By turning the gripping portion 71a from this state, the bypass valve body 61 can be turned and the bypass switching valve 60 can be switched to the open state.

  As shown in FIG. 4, when the gripping portion 71a is rotated 90 degrees counterclockwise, the positions of the distal end locking portion 71e and the attached portion 62z and the operation window portion 66e of the cover 66 are rotated as shown in FIG. Since the position is shifted, the distal end locking portion 71e is caught on the bottom 66b of the cover 66, and the handle member 71 cannot be removed. Therefore, when the handle member 71 is in the same direction as the operation window hole 66e of the cover 66 shown in FIG. 10A and the attached portion 62z of the second drive shaft 62x, that is, the bypass valve body 61 connects the bypass pipe 30. It can be inserted and removed only when it is shut off. Therefore, the bypass switching valve 60 is always closed in a state where the operating instrument 70 is removed.

(How to replace the gas meter)
A method for replacing the gas meter M using the gas meter joint unit A will be described.
As shown in FIG. 12 (A), the flow path of the joint unit A in the normal use state shown in FIG. 2 is such that the first switching valve 40 of the inlet side connecting pipe 10 is in the three-way open state, and the outlet side connecting pipe 20 2 The switching valve 50 is open, and the bypass switching valve 60 of the bypass pipe 30 is closed. At this time, as shown in FIG. 2, the head portion 43a of the lock pin 43 of the locking means L1 of the first switching valve 40 and the cylinder portion 66a of the cover 66 of the bypass switching valve 60 are opposed to each other at a close distance. The locking means L1 cannot be released by pushing the head 43a, and the first valve operating portion 42 cannot be turned counterclockwise. That is, the first switching valve 40 cannot be switched so as to narrow the flow path to the gas meter M while securing the flow path to the bypass pipe 30.

  First, the bypass switching valve 60 is opened. As shown in FIG. 3, when the operating instrument 70 is attached to the bypass switching valve 60 and the operating instrument 70 is rotated 90 degrees counterclockwise as shown in FIG. 4, as shown in FIG. The valve body 61 communicates the bypass pipe 30, the first pressing portion 71 x of the operating instrument 70 presses the head portion 43 a of the lock pin 43, and the second pressing portion 72 x presses the distal end portion 53 a of the lock pin 53. . Therefore, the switching prevention in the 1st switching valve 40 and the 2nd switching valve 50 is cancelled | released simultaneously.

  Next, as shown in FIG. 5, the first valve operating portion 42 is rotated 45 degrees counterclockwise, and as shown in FIG. 12C, the flow path to the bypass pipe 30 in the first switching valve 40. The flow path to the gas meter M side is narrowed while ensuring the above. Next, as shown in FIG. 6, when the second valve body operation unit 52 is rotated 90 degrees counterclockwise, and the second switching valve 50 is in the bypass state as shown in FIG. The flow path from the gas meter M side in the connection pipe 20 is blocked, and the gas flows from the primary side gas pipe G1 to the secondary side gas pipe G2 via the bypass pipe 30.

  Next, in the state of FIG. 6, the head 43a of the lock pin 43 of the first switching valve 40 is pressed to release the switching prevention, and the first valve operating portion 42 is rotated counterclockwise as shown in FIG. Rotate 45 degrees to bypass. At this time, as shown in FIG. 13B, the first valve body 41 allows only the primary side gas pipe G1 and the bypass pipe 30 to communicate with each other, the gas stops flowing to the gas meter M side, the gas meter M is removed, It becomes possible to replace with a new gas meter.

(After replacing the gas meter)
As shown in FIG. 13C, when the gas meter M ′ is newly attached after the gas meter M is removed, it is necessary to perform an airtight inspection thereof.
In the airtight inspection, as shown in FIG. 14A, air is sent from an air pump (not shown) to the gas meter M ′ via the pressure detection plug P to apply pressure. If the pressure drop after the elapse of the predetermined time is within the allowable range, the newly installed gas meter M ′ is kept airtight.

After the air tightness test, it is necessary to purge the air to remove air from the inlet side connecting pipe 10, the gas meter M ′, and the outlet side connecting pipe 20 upstream of the second switching valve 50. There is.
In the air purge, first, a socket (not shown) is connected to the pressure detection plug P, and the gas meter M ′ is communicated with the atmosphere. As shown in FIG. 6 from the state of FIG. 7, the first valve operating section 42 is rotated 45 degrees clockwise, and as shown in FIG. 14B, the first switching valve 40 flows to the bypass pipe 30. While securing the path, the flow path to the gas meter M ′ side is opened. The gas continues to be supplied to the secondary gas pipe G2 and is supplied to the gas meter M ′ side. When it is confirmed that the gas is discharged from the pressure detection plug P and the socket (not shown) and the gas is filled in the gas meter M ′, the socket is removed from the pressure detection plug P and the gas meter M ′. Shut off from the atmosphere.

After the air purge, in order to return the joint unit A to the normal use state, the second valve operating portion 52 is rotated 90 degrees clockwise as shown in FIG. 5 from the state of FIG. 6, and as shown in FIG. Then, the second switching valve 50 is opened, and the gas meter M ′ and the secondary gas pipe G2 are communicated.
Next, from the state of FIG. 5, the first valve operating portion 42 is rotated 45 degrees clockwise as shown in FIG. 4, and the first switching valve 40 is moved to the primary gas pipe as shown in FIG. A three-way open state is established in which G1, the gas meter M, and the bypass pipe 30 are in communication.
Finally, the operating instrument 70 is rotated 90 degrees clockwise as shown in FIG. 3 from the state shown in FIG. 4, and the bypass switching valve 60 is closed as shown in FIG. At this time, the operating instrument 70 can be removed from the bypass switching valve 60. In this way, the joint unit A is again in a normal use state.

  When the gas is not used for a long period of time, the first valve operating portion 42 is moved from the normal use state of the joint unit A shown in FIGS. 2 and 12A to the clock as shown in FIG. The first switching valve 40 is turned to a closed state in which the primary side gas pipe G1, the gas meter M, and the bypass pipe 30 are shut off. At this time, by screwing the screw 45, the first valve operating portion 42 can be fixed to the valve accommodating hole 14, and the first switching valve 40 can be fixed in the closed state.

(Effect of 1st Embodiment)
In the gas meter coupling unit A configured as described above, the safety against gas theft can be enhanced by providing a bypass switching valve in the bypass pipe.
In the replacement work of the gas meter, when switching from the closed state to the open state using an operating tool for switching the bypass switching valve, the switching prevention of the first and second switching valves can be released at the same time. Can be increased.

  Next, another embodiment of the present invention will be described. In the following embodiments, only the configuration different from the above-described embodiment will be described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

[Second Embodiment]
In the first embodiment, the bypass valve operation unit 62 is configured by the first drive shaft 62a and the second drive shaft 62b. However, in the present embodiment, the bypass valve operation unit 62 is configured by only the first drive shaft 62a. Yes.
Moreover, in this embodiment, the shape of the attaching part 71b of the holding member 71 of the operating instrument 70 is different.

The attachment portion 71b has a columnar shaft portion 71c, and has a proximal end locking portion 71d and a deformed portion 71f at the proximal end portion and the distal end portion, respectively. Both the base end locking portion 71d and the deformed portion 71f are formed in a double circle shape with a small circular portion protruding from the shaft portion 71c in the radial direction.
The top surface of the shaft portion 71c is provided with a front end locking portion 71g, which is an oval convex portion. By being locked, the operating instrument 70 is attached to the bypass valve operating portion 62.

  The deformed portion 71f of the handle member 71 has substantially the same cross-sectional shape as the operation window hole 66e of the cover 66, and has a similar shape. As shown in FIG. 16 (A), when the bypass switching valve 60 is in the closed state, the deformed portion 71f is inserted into the operation window hole 66e, and the tip locking portion 71g is attached to the connecting recess 62b of the first drive shaft 62a. Further, the distal end locking portion 71g can be removed from the connecting recess 62b, and the deformed portion 71f can be extracted from the operation window hole 66e.

[Third Embodiment]
In the above embodiment, the cover that covers the bypass valve operation unit is used as the non-switchable unit of the bypass switching valve. However, in this embodiment, a fixing unit that fixes the bypass valve operation unit to the valve housing unit is used. .

(Bypass switching valve)
As shown in FIG. 17, the bypass switching valve 60 of the present embodiment includes a valve accommodating portion 31 formed in the bypass pipe 30, a bypass valve body 61 rotatably accommodated in the valve accommodating portion 31, and a bypass valve A bypass valve operating portion 62 is connected to the body 61 and is a bottomed cylindrical knob for operating the bypass valve body 61. The bypass valve operation part 62 seals the valve accommodating part 31 from the front in a rotatable state. FIG. 17 shows the position of the bypass valve operating portion 62 when the bypass switching valve 60 is in the closed state.

(Bypass switching valve fixing means)
As shown in FIG. 17B, the bypass switching valve 60 is provided with locking means LB (non-switchable means) for fixing the closed state.
The locking means LB has a screw v (fixing means) provided in the bypass valve operating portion 62 in parallel with the rotation axis. The screw v is screwed into a screwing portion (not shown) embedded in the bypass valve operation unit 62 and can advance and retreat, and always protrudes from the back side of the bypass valve operation unit 62. As shown in FIG. 17A, two holes v1 and v1 are formed at the top of the screw v, and the screw v cannot be operated unless it is a special tool such as a crab tool.

  As shown in FIG. 17B, a restriction recess 31a for restricting the movement of the screw v in the circumferential direction of the bypass valve operating portion 62 is provided in the opening of the valve accommodating portion 31. The regulating recess 31a has a circumferential length slightly longer than 90 degrees. An engagement recess 31b is formed at one end of the restriction recess 31a. When the bypass valve operating portion 62 is in the closed position shown in FIG. 17, the screw v matches the position of the engaging recess 31b and fits into the engaging recess 31b by screwing. As a result, the bypass valve operating portion 62 is fixed to the bypass valve housing portion and cannot be turned, and as a result, the bypass switching valve 60 is fixed in the closed state.

In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, various modifications can be employ | adopted.
In the above-described embodiment, the switching to the open state of the bypass switching valve and the cancellation of the switching prevention of the first and second switching valves are performed simultaneously using the operating tool, but they may be performed separately. Using the operating tool, the switching of the bypass switching valve and the cancellation of the switching prevention of the first switching valve may be performed simultaneously, or the switching of the bypass switching valve and the cancellation of the switching prevention of the second switching valve may be performed simultaneously. Good.
In the said embodiment, although the operating instrument was comprised with two members, the holding member which has a 1st press part, and the cancellation | release metal fitting which has a 2nd press part, it is one member which has a 1st press part and a 2nd press part. It may be configured.
In the above embodiment, when the position of the first valve operation unit in the normal use state of the joint unit, the first switching valve is in a three-way open state, but may be in an open state in which only the primary side gas pipe and the gas meter are communicated, When the first valve operating portion is rotated 45 degrees counterclockwise, it may be in a three-way open state.

  The present invention can be applied to a joint unit for a gas meter that can replace the gas meter without stopping the gas supply to the gas equipment.

A Gas meter fitting unit G1 Primary side gas pipe G2 Secondary side gas pipe M, M 'Gas meter 10 Inlet side connecting pipe 11 Upstream side end 12 Downstream side end 13 Crossing part 20 Outlet side connecting pipe 21 Upstream side end 22 Downstream end portion 23 Crossing portion 24 Second valve accommodating portion 24b Opening 30 Bypass pipe 31 Bypass valve accommodating portion 40 First switching valve 43 Lock pin (first release portion)
43a Head (pressing part)
50 2nd switching valve 51 2nd valve body 52 2nd valve operation part 53 Lock pin (2nd cancellation | release part)
53a Tip (pressing part)
60 Bypass switching valve 61 Bypass valve body 62 Bypass valve operation section 62a First drive shaft (bypass valve operation section)
62x Second drive shaft (bypass valve operation part)
62z Mounted portion 66b Bottom portion 66e Operation window hole 66f Groove portion 66 Cover (non-switchable means)
70 Operating instrument 71b Mounting portion 71c Shaft portion 71e Tip locking portion (deformed portion)
71f deformed part 71g tip locking part v screw (fixing means)
L1 lock means (first lock means)
L2 locking means (second locking means)

Claims (14)

An inlet side connecting pipe having a primary gas pipe connected to the upstream end and an inlet of the gas meter connected to the downstream end;
An outlet-side connecting pipe having a gas meter outlet connected to the upstream end and a secondary gas pipe connected to the downstream end;
A bypass pipe communicating the inlet side connecting pipe and the outlet side connecting pipe;
The inlet side connecting pipe is provided with a first switching valve at an intersection with the bypass pipe, and the first switching valve is in a three-way open state in which at least the primary side gas pipe, the gas meter, and the bypass pipe communicate with each other. , And can be switched to a bypass state in which the primary side gas pipe and the bypass pipe communicate with each other,
The outlet side connecting pipe is provided with a second switching valve at an intersection with the bypass pipe, and the second switching valve is at least in an open state in which the gas meter and the secondary side gas pipe communicate with each other, and the bypass pipe Can be switched to the bypass state that allows the secondary gas pipe to communicate with
In a gas meter joint unit in which gas flows from the primary side gas pipe to the secondary side gas pipe through the inlet side connection pipe, the gas meter, and the outlet side connection pipe in a normal use state,
The bypass pipe is provided with a bypass switching valve,
The bypass switch valve can be switched between an open state in which the bypass pipe is communicated and a closed state in which the bypass pipe is shut off.   2. The gas meter coupling unit according to claim 1, wherein the bypass switching valve is provided with non-switchable means for making the switching impossible.   The first switching valve is provided with first locking means for preventing switching from the normal use state so as to narrow the flow path to the gas meter side while securing the flow path to the bypass pipe. The joint unit for gas meters according to claim 1 or 2. The first lock means has a first release portion that releases switching prevention by pressing, and the first release portion has the pressing portion exposed to the outside,
The joint unit for a gas meter according to claim 3, wherein, in the normal use state, the pressing portion of the first release portion faces the bypass switching valve and faces the bypass switching valve at a close distance. . The bypass switching valve is detachably mounted with an operating tool for switching between its closed state and open state,
When the bypass switching valve is switched from the closed state to the open state by the operating tool, the operating tool presses the pressing portion of the first release portion to release the switching prevention of the first switching valve. The joint unit for gas meters according to claim 4 characterized by things.   The gas meter joint unit according to any one of claims 1 to 3, wherein the second switching valve is provided with second locking means for preventing switching from an open state to a bypass state. The second switching valve is provided with second locking means for preventing switching from the open state to the bypass state,
The second locking means has a second release portion that releases the switching prevention by pressing, and the second release portion has a pressing portion that is exposed to the outside at least when the second switching valve is open. ,
When the bypass switching valve is switched from the closed state to the open state by the operating tool, the operating tool presses the pressing portion of the second release portion to release the switching prevention of the second switching valve. The gas meter coupling unit according to claim 5, wherein the gas meter coupling unit is a gas meter coupling unit. The second lock means has a second release portion that releases switching prevention by pressing, and the second release portion has a pressing portion that is exposed to the outside at least when the second switching valve is in an open state. ,
The bypass switching valve is detachably mounted with an operating tool for switching between its closed state and open state,
When the bypass switching valve is switched from the closed state to the open state by the operating tool, the operating tool presses the pressing portion of the second release portion to release the switching prevention of the second switching valve. The gas meter joint unit according to claim 6, wherein the gas meter joint unit is a gas meter joint unit. The second switching valve is rotatably accommodated in a second valve accommodating portion formed at the intersection of the outlet side connecting pipe and the bypass pipe, and the outlet side connecting pipe. And a bypass valve that communicates and blocks the second switching valve to switch between an open state and a bypass state of the second switching valve, and is provided in the second valve body, exposed from the second valve housing portion and A second valve operating portion that enables a switching operation of the second valve body,
The second release portion of the second lock means is provided in the second valve operating portion in a direction orthogonal to the rotational axis thereof, and the second valve body is in the open position of the second switching valve. 9. The joint unit for a gas meter according to claim 7, wherein the pressing portion of the second release portion is exposed from an opening formed facing downward in the second valve housing portion. The bypass switching valve is rotatably accommodated in a bypass valve accommodating portion formed in the bypass pipe and in the bypass valve accommodating portion, and the bypass switching valve is communicated and blocked to open and close the bypass switching valve. A bypass valve body that switches to a state, and a bypass valve operation section that is provided in the bypass valve body and that is exposed from the bypass valve housing section and enables the switching operation of the bypass valve body,
The gas meter joint unit according to claim 2, wherein a cover that covers the bypass valve operation part and disables the operation is attached to the bypass valve housing part as the non-switchable means. The cover is formed with an operation window hole penetrating the outside and the inside thereof, and an attachment portion of an operation tool for operating the bypass valve operation portion can be inserted into the operation window hole,
The joint unit for a gas meter according to claim 10, wherein the bypass valve operating portion has a mounted portion to which the mounting portion of the operating instrument is attached. The position of the cover is fixed to the bypass valve housing,
The attached portion of the bypass valve operating portion is formed in a non-circular shape,
The mounting portion of the operating instrument has a shaft portion, a non-circular deformed portion formed at the tip portion of the shaft portion, and a non-circular tip locking portion locked to the attached portion,
The deformed portion of the operation instrument and the operation window hole of the cover have cross-sectional shapes similar to each other,
When the bypass valve body is in the closed position of the bypass switching valve, the deformed portion of the operating tool is inserted into and removed from the operating window hole, and the distal end locking portion of the operating tool is connected to the bypass valve operating portion. The joint unit for a gas meter according to claim 11, wherein the joint unit can be engaged with and disengaged from the attached portion. The cover has a bottom and is formed in a cylindrical shape, the operation window hole is formed in the bottom,
The bypass valve body and the rotation axis of the bypass valve operating section, and the axis of the cover extend in the horizontal direction,
The gas meter joint unit according to claim 11 or 12, wherein a groove portion extending downward from the operation window hole and penetrating through the bottom portion is formed in the bottom portion of the cover. The bypass switching valve is rotatably accommodated in a bypass valve accommodating portion formed in the bypass pipe and in the bypass valve accommodating portion, and the bypass switching valve is communicated and blocked to open and close the bypass switching valve. A bypass valve body that switches to a state, and a bypass valve operation section that is provided in the bypass valve body and that is exposed from the bypass valve housing section and enables the switching operation of the bypass valve body,
The non-switchable means has a fixing means for fixing the bypass valve body at a blocking position of the bypass pipe by fixing the bypass valve operating part to the bypass valve housing part. Item 3. A gas meter coupling unit according to Item 2.

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