JP2007033189A - Gas meter mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas meter mounting structure dispensing with a complicated work to a gas pipe system, capable of mounting a meter side connection part of a gas meter on a pipe side connection part of the gas pipe system in a proper state, and preventing connection failure or the like, concerning the gas meter connection structure wherein the gas meter is mounted in the state where a pair of adapter members are inserted, whose one end side is connected to the pipe side connection part by a screw type pipe joint and whose other end is connected to the meter side connection part by a union type pipe joint, in a configuration wherein gas flowing into one side of a pair of meter side connection parts is allowed to flow out from the other side, relative to the gas pipe system wherein one side of the pair of pipe side connection parts is linked to a gas supply source and the other side is linked to a gas supply destination. <P>SOLUTION: At least one side of the pair of screw type pipe joints 16 is constituted as a screw type pipe joint by a parallel screw for the pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention has a pair of pipe-side connection portions that open in the same direction, and one side of the pair of pipe-side connection portions communicates with a gas supply source and the other side communicates with a gas supply destination. And
A pair of meter-side connection portions that open opposite the pair of pipe-side connection portions, and gas that has flowed into one side of the pair of meter-side connection portions is allowed to flow out from the other side; A gas meter that measures the flow rate
One end side is connected to the pipe side connection portion with a screw-in type pipe joint, and the other end side is attached in a state of interposing a pair of adapter members connected to the meter side connection portion with a union type pipe joint. It relates to a gas meter connection structure configured as described above.

Normally, a gas meter for measuring the flow rate of gas supplied to a consumer is attached to a gas piping system for a gas supplier to supply gas such as city gas to the consumer.
In general, the gas meter has a pair of meter side connection portions that both open upward, and the gas flowing into one side of the pair of meter side connection portions flows out from the other side, It is configured to measure the gas flow rate.
Moreover, the gas piping system to which the gas meter is attached has a pair of piping side connection portions that open to face a pair of meter side connection portions formed in the gas meter, and one of the pair of piping side connection portions. The side is connected to a conduit as a gas supply source, and the other side is connected to a consumer side as a gas supply destination. Specifically, a pair of vertical pipes communicating with each of the gas supply source and the gas supply destination is installed in a form extending upward from the ground or the like, and a meter side connection is provided at the upper end of each of the pair of vertical pipes. A pair of elbows each having a pipe-side connecting portion facing each other are attached.

  And a pair of meter side connection part formed in this gas meter is attached to a pair of pipe side connection part formed in the gas piping system side via a pair of adapter member. The adapter member is screwed in such a manner that one end of the pipe is connected to the meter-side connection portion by a union-type pipe joint and the other end is screwed into a pipe taper female screw formed in the pipe-side connection portion. It is comprised so that it may be connected by a type pipe joint (for example, refer patent document 1).

JP 2000-337942 A

As described above, the gas piping system to which the gas meter is attached has a relative position of the pair of pipe side connection portions in the vertical direction in which the pipe side connection portion faces the meter side connection portion due to ground subsidence, deformation over time, etc. It will shift | deviate and there is a concern about the connection defect in a connection part.
And in order to repair such a shift in the relative position of the pair of meter side connection parts, for example, the existing standpipe is cut and shortened in order to change the length and installation angle of the standpipe of the gas piping system. Complicated work on the gas piping system is required.

  This invention is made | formed in view of said subject, The objective does not require the complicated construction with respect to the above gas piping systems, The meter side connection part of a gas meter is made with respect to a pipe side connection part. The object is to provide a gas meter mounting structure that can be mounted in an appropriate state and can prevent connection failure.

In order to achieve the above object, a gas meter mounting structure according to the present invention has a pair of pipe side connection portions that open in the same direction, and one side of the pair of pipe side connection portions communicates with a gas supply source. For the gas piping system that the other side leads to the gas supply destination,
A pair of meter-side connection portions that open opposite the pair of pipe-side connection portions, and gas that has flowed into one side of the pair of meter-side connection portions is allowed to flow out from the other side; A gas meter that measures the flow rate
One end side is connected to the pipe side connection portion with a screw-in type pipe joint, and the other end side is attached in a state of interposing a pair of adapter members connected to the meter side connection portion with a union type pipe joint. The first characteristic configuration is that at least one side of the pair of screw-type pipe joints is configured as a screw-type pipe joint using pipe parallel threads.

According to the first characteristic configuration, at least one side of a pair of screw-type pipe joints that are pipe joints connecting the pipe-side connecting portion and the adapter member is not a taper screw for pipes with a specified screw-in depth, but leaks. Since it is configured as a screw-in type pipe joint with parallel threads for pipes that can be connected at any screwing depth within the range of the lower limit of the screwing depth that can be prevented and the upper limit of the screwing depth that is structurally possible, As long as the range of the threaded depth of the above-mentioned parallel pipe thread allows the distance between the pipe-side connecting part and the meter-side connecting part that are connected via the adapter member on the screw-in type pipe joint that employs the parallel pipe thread It becomes possible to adjust arbitrarily.
Accordingly, even when the relative position of the pair of pipe side connection portions, particularly in the direction facing the meter side connection portion, is shifted, the distance between at least one pipe side connection portion and the meter side connection portion is set to Therefore, the relative position of the pair of union-type pipe joints of the adapter member connected to the meter side connection portion can be always maintained in an appropriate state. Therefore, the gas meter mounting structure according to the present invention prevents the poor connection and the like by attaching the meter side connection part of the gas meter to the pipe side connection part in an appropriate state without requiring complicated construction for the gas piping system. can do.

The second characteristic configuration of the gas meter mounting structure according to the present invention includes a plate-like fixing plate formed with a pair of openings into which the male thread forming portions of the pair of screw-type pipe joints are inserted,
The fixing plate is fixed in such a manner that one lock nut screwed to the male screw on one side of the pair of screw-type pipe joints and the end of the female screw forming portion are clamped, and the other side is screwed to the male screw. In the point which is comprised so that it may fix in the form which clamps the said fixing plate with a pair of lock nut combined.

According to the second characteristic configuration, the male thread formation in which the male threads of the pair of screw-type pipe joints that connect the pipe-side connecting portion and the adapter member are formed in the pair of openings formed in the fixing plate, respectively. Since the fixing plate is fixed to each of the pair of screw-type pipe fittings by lock nuts with the part inserted, the distance between the pair of screw-type pipe fittings in the gas piping system, particularly the meter side connection part It is possible to maintain the relative position and the like in the direction opposite to.
In addition, one side of the pair of openings formed in the fixing plate is fixed in a state of being sandwiched between the lock nut screwed into the male screw and the end of the female screw forming portion, while the other On the side, it is fixed in a state of being sandwiched between a pair of lock nuts screwed to the male screw, and the pair of lock nuts is fixed in such a manner that the fixing plate is sandwiched at an arbitrary position of the male screw. Can do. Therefore, even when the relative position in the direction facing the meter side connection portion of the pair of screw-type pipe joints is shifted, the fixing plate is installed parallel to the direction connecting the pair of meter connection portions (for example, in the horizontal direction). The distance and relative position between the screw-type fittings can be appropriately fixed and maintained by the fixing plate.

  According to a third characteristic configuration of the gas meter mounting structure according to the present invention, the gas piping system includes a pair of vertical pipes communicating with the gas supply source and the gas supply destination, and ends of the pair of vertical pipes, respectively. Each of the pipe-side connection portions has a pair of elbows formed therein.

  According to the third characteristic configuration, particularly, as in the gas piping system configured by the rigid piping members of the pair of standing tubes and the pair of elbows attached to the respective end portions as described above, In the case where the relative position in the direction facing the meter side connection portion of the pair of pipe side connection portions which are the end portions of the pair of elbows tends to shift due to the inclination of the vertical pipe or the settlement of the ground holding the vertical pipe, etc. The gas meter mounting structure according to the present invention can be suitably applied.

An embodiment of a gas meter mounting structure according to the present invention will be described with reference to the drawings.
As shown in the assembly drawings of FIGS. 1 (a) and 1 (b) and the exploded view of FIG. 2, the gas equipment is connected to the customer as the gas supply destination from the conduit S operated by the gas supplier as the gas supply source. A gas meter 20 for measuring the flow rate of the gas supplied to the consumer side is attached to a gas piping system for supplying gas such as city gas to the inner pipe D.
Such a gas piping system is installed in a form in which a pair of vertical pipes 1 communicating with the conduit S and the inner pipe D extend upward from the ground or the like.

A pair of elbows 2 formed with respective pipe side connection portions 4 opposed to a pair of meter side connection portions 21 provided in a gas meter 20 to be described later in detail at the upper end portions of the pair of standing pipes 1. Is attached.
The elbow 2 used in the present embodiment has an elbow having one end connected to the standpipe 1 and the other end opened horizontally, and one end connected to the elbow and the other end serving as a pipe side connecting portion 4 in the downward direction. It is configured as a combination with an open elbow.
That is, the pair of pipe-side connection portions 4 is a pair of openings that open in the same direction, specifically downward, at the end opposite to the end connected to the standpipe 1 of each elbow 2. It is formed as an opening.

  A meter gas plug 3 is provided in the vertical pipe 1 on the conduit S side. Therefore, by operating the meter gas plug 3, the supply of gas from the conduit S to the inner pipe D through the gas meter 20 can be interrupted.

  Since the gas meter 20 has the same structure as a known gas meter, the detailed description thereof is omitted. However, the gas meter 20 has a pair of meter side connection portions 21 that open to face the pipe side connection portion 4 described above. The gas flow rate is measured in such a manner that the gas flowing into one side of the connecting portion 21 flows out from the other side.

The upper surface of the gas meter 20 is provided with a pair of pipe portions 22 extending upward from the upper surface, and the upper end portion of each of the tube portions 22 serves as the meter side connection portion 21.
That is, the pair of meter-side connection portions 21 are formed as a pair of openings that open in the same direction, specifically upward, at the upper ends of the respective tube portions 22 provided on the upper surface of the gas meter 20. ing.

  And a pair of piping side connection part 4 provided in the gas piping system mentioned above and opening toward the downward direction mutually, and a pair of meter side connection part 21 provided in the gas meter 20 mentioned above and opening toward the upward direction mutually. Are connected to each other in a state of interposing a pair of adapter members 10 to be described later, whereby the gas meter 20 is attached to the gas piping system.

Next, the configuration of the adapter member 10 will be described.
Referring also to the partially exploded perspective view of FIG. 3, the adapter member 10 includes a tubular main body 11, a union nut 14, a meter packing 24, and the like.

  One end portion (upper end portion) of the adapter member 10 is connected to the pipe side connection portion 4 by a screw-type pipe joint 16. In this screw-type pipe joint 16, the male screw 12 formed at the upper end of the tubular body 11 is screwed onto the female screw 5 formed at the pipe-side connecting portion 4 in a state where, for example, a liquid sealant is applied. It is configured.

On the other hand, the other end portion (lower end portion) of the adapter member 10 is connected to the meter side connection portion 21 by a union-type pipe joint 17. The union-type pipe joint 17 is attached to the tubular main body 11 in a state where the lower end surface of the union collar 13 formed at the lower end portion of the tubular main body 11 is brought into contact with the upper end surface of the pipe portion 22 of the meter side connection portion 21. On the other hand, the union nut 14, which is prevented from coming off by the union collar 13, is configured to be screwed into a male screw formed in the pipe portion 22 of the meter side connection portion 21. A meter packing 24 is interposed between the lower end surface of the union collar 13 and the upper end surface of the pipe portion 22, and gas leakage is prevented by the meter packing 24.
In the present embodiment (FIG. 2), the meter packing 24 is sandwiched and fixed between the union collar 13 and the pipe portion 22, but separately protrudes from the lower end surface of the union collar 13 to the meter side. As a structure in which a cylindrical projecting portion to be inserted into the portion 22 is provided and the meter packing 24 is externally fitted to the cylindrical projecting portion, the work efficiency at the time of mounting is improved and adhesion is prevented by preventing the meter packing 24 from being displaced or dropped. Can also be improved.

  Furthermore, in the gas meter mounting structure described above, the relative position in the vertical direction of the pair of union fittings 17 is maintained at an appropriate level, and the meter side connection portion 21 of the gas meter 20 is kept in an appropriate state by the union fitting 17. In order to prevent attachment, connection failure, and the like, both of the pair of screw-type pipe joints 16 are configured as screw-type pipe joints using parallel pipe threads.

  That is, the internal thread 5 formed on the pipe-side connecting portion 4 and the external thread 12 formed on the upper end portion of the adapter member 10 are not pipe taper screws whose threading depth is specified, but have a threading depth that can prevent leakage. It is formed as a parallel thread for a pipe that can be connected at an arbitrary screwing depth within a range that is not less than the lower limit and not more than the upper limit of the screwing depth that is structurally possible.

  Therefore, for example, as shown in FIG. 2, even when the relative position in the vertical direction facing the meter side connection portion 21 of the pair of pipe side connection portions 4 is shifted, as shown in FIG. By adjusting the screwing depth of the male screw 12 with respect to the female screw 5 on at least one side of the pair of screw-type pipe joints 16, the relative position of the pair of union-type pipe joints 17 can be maintained horizontally.

Moreover, as shown in FIG. 4, when a pair of adapter member 10 is attached with respect to a pair of piping side connection part 4, whether the lower end surface of the union collar 13 of each tubular main body 11 is a horizontal state This is confirmed by the level 30, and the pair of adapter members 10 can be attached in an appropriate state where the relative position of the pair of union-type pipe joints 17 is horizontal.
As shown in FIG. 5, the level 30 has a transparent case 31 formed in a partially spherical shape on a plate-like member 32 whose upper surface is in contact with the lower end surface of each union collar 13. A liquid is accommodated inside the case 31 so that the front, back, left and right tilt states of the plate-like member 32 with respect to the horizontal can be detected from the position of the bubbles in the liquid.

Next, a description will be given of the above-described method for fixing the gas piping system.
A plate-like fixing plate 25 (see FIG. 3) having a pair of openings 26 into which the male screw forming portions in which the male screws 12 on the tubular body side 11 of the pair of screw-type pipe joints 16 are formed are inserted, The distance and relative position between the pair of screw-type pipe joints 16 are fixed.
That is, as shown in FIG. 1A and FIG. 2, one lock nut 27 screwed to the male screw 12 on one side of the pair of screw-type pipe joints 16 and the pipe-side connection portion 4 are formed. The fixing plate 25 is fixed in such a manner that the fixing plate 25 is clamped by the end of the female screw forming portion where the female screw 5 is formed, and the fixing plate 25 is clamped by a pair of lock nuts 28 screwed into the male screw 12 on the other side. By fixing with, it is comprised so that the fixing plate 25 may be fixed to a gas piping system.

  On the side sandwiched between the pair of lock nuts 28 at both ends of the fixed plate 25 (in the present embodiment, the inner pipe D side), the pair of lock nuts 28 is located at any position of the male screw 12. Since the fixing plate 25 can be fixed in a sandwiched manner, the fixing plate 25 can always be fixed in an appropriate state (parallel).

[Another embodiment]
(1) In the above embodiment, in the screw-in type pipe joint 16, the female screw 5 is formed on the pipe-side connecting portion 4 side and the male screw 12 is formed on the adapter member 10 side. A male screw may be formed, and a female screw may be formed on the adapter member 10 side.

(2) In the above embodiment, both the pair of screw-type pipe joints 16 are configured as screw-type pipe joints using parallel pipe threads, but only one side of the pair of screw-type pipe joints 16 is used for pipes. It may be configured as a screw-in type pipe joint using a parallel screw to enable adjustment of the screw-in depth, and the other side may be configured as a screw-in type pipe joint using a pipe taper screw.

(3) In the above embodiment, a structure in which the fixing plate 25 is fixed by the lock nuts 27 and 28 is adopted. However, this structure may be modified or omitted separately.

(4) In the above embodiment, the gas piping system is constituted by a pair of standing pipes 1 and a pair of elbows 2, but the structure of this gas piping system may be modified separately.

  The gas meter mounting structure according to the present invention has a pair of pipe side connection portions that open in the same direction, and one side of the pair of pipe side connection portions communicates with a gas supply source and the other side communicates with a gas supply destination. The gas piping system has a pair of meter side connection portions that open to face the pair of pipe side connection portions, and gas flowing into one side of the pair of meter side connection portions from the other side. A gas meter that measures the flow rate of gas in the form of flowing out, one end side is connected to the pipe side connection part with a screw-type fitting, and the other end side is connected to the meter side connection part with a union type fitting The gas meter connection structure is configured to be attached in a state where a pair of adapter members are interposed, and does not require complicated construction for the gas piping system, and the meter side connection portion of the gas meter is connected to the piping side. Respect can be mounted in a proper state, it is effectively available as a gas meter mounting structure capable of preventing a connection failure or the like.

(A) Assembly elevation view of gas meter mounting structure, (b) Partial sectional view of connection part Exploded elevation view of gas meter mounting structure Disassembled perspective view of gas meter mounting structure Elevated view showing the adapter member attached Perspective view of spirit level

Explanation of symbols

1: Vertical pipe 2: Elbow 4: Piping side connection part 5: Female thread 10: Adapter member 12: Male thread 16: Screw-in type fitting 17: Union type fitting 20: Gas meter 21: Meter side connecting part 25: Fixing plate 27 28: Lock nut

Claims (3)

For a gas piping system having a pair of pipe side connection portions that open in the same direction, one side of the pair of pipe side connection portions leading to the gas supply source and the other side leading to the gas supply destination,
A pair of meter-side connection portions that open opposite the pair of pipe-side connection portions, and gas that has flowed into one side of the pair of meter-side connection portions is allowed to flow out from the other side; A gas meter that measures the flow rate
One end side is connected to the pipe side connection portion with a screw-in type pipe joint, and the other end side is attached in a state of interposing a pair of adapter members connected to the meter side connection portion with a union type pipe joint. A gas meter connection structure configured as follows:
A gas meter mounting structure in which at least one side of the pair of screw-type pipe joints is configured as a screw-type pipe joint with a parallel pipe screw. A plate-like fixing plate formed with a pair of openings into which the male thread forming portions of the pair of screw-type pipe joints are inserted;
The fixing plate is fixed in such a manner that one lock nut screwed to the male screw on one side of the pair of screw-type pipe joints and the end of the female screw forming portion are clamped, and the other side is screwed to the male screw. The gas meter mounting structure according to claim 1, wherein the gas meter mounting structure is configured to be fixed in a form in which the fixing plate is sandwiched by a pair of combined lock nuts.   A pair of elbows in which the gas piping system is formed with a pair of vertical pipes communicating with the gas supply source and the gas supply destination, respectively, and the pipe side connection portions are formed from respective ends of the pair of vertical pipes. The gas meter mounting structure according to claim 1 or 2, wherein the gas meter mounting structure is provided.

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