JP2000146660A - Piping structure around gas meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components, improve the workability of piping, and lessen possible gas leakage parts by connecting a gas consumption piping and a gas supply piping to gas meter joints through an L-shaped pipe and two components of joint. SOLUTION: A ball valve 51 is connected to an L-shaped pipe 42 coupled with a gas meter joint through an L-shaped pipe 10 and joints 20, 30. This reduces the number of components and eases connection works of screwing, etc. The joints 20, 30 can be formed by molds and the pipe 10 has only one bend, this facilitating forming components and suppressing the cost low. The joint 30 is composed of a gas entrance 31 integrated with a gas outlet 32 through a coupling 33 to result in that the piping 10 of the gas inlet system is unified with a piping 64 of the gas outlet system, this providing a structure strong against external forces to avoid damaging a gas meter 40 and increase the stability of the meter 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure around a gas meter for connecting a piping system on a gas supply side and a consumption side to a gas meter coupling to which a gas inlet / outlet of the gas meter is connected.

[0002]

2. Description of the Related Art An LP gas piping system is configured as shown in FIG. 15, for example. Here, gas from two LP gas cylinders (not shown) is supplied by a high-pressure hose (dashed line),
Automatic switching pressure regulator 50, ball valve (open / close valve)
51, short nipple 52, cheese 53, long nipple 54,
The gas flows into the gas meter 40 through the elbow 55, the riser tube 56, the elbow 57, the long nipple 58, the elbow 60, the long nipple 61, and the L-shaped tube (elbow) 42. The gas from the gas meter 40 is supplied to the gas consuming side via a pipe 64 via an L-shaped pipe 42, a long nipple 62, and an elbow 63.

The automatic switching pressure regulator 50 switches between two LP gas cylinders and adjusts the gas pressure to an appropriate value. The ball valve 51 has a lever 51a for opening and closing a gas flow path. Cheese 53 is drain drain portion 53a
And a drain stopper 53a is usually plugged. The gas inlet / outlet of the gas meter 40 is connected and fixed to the L-shaped pipe 42 via a gas meter joint body (not shown) with a cap nut 41 of the gas meter joint.

There is also a piping structure as shown in FIG.
Here, the ball valve 51 and the gas inlet of the gas meter 40 are connected by one pipe 70, and the gas outlet of the gas meter 40 is connected to a gas consuming side pipe 64.

[0005]

In the piping structure as shown in FIG. 15, a short nipple 5 is used to connect the ball valve 51 and the L-shaped pipe 42 to the gas meter joint.
2, cheese 53, long nipple 54, elbow 55, riser 56, elbow 57, long nipple 58, elbow 6
0, the parts of the long nipple 61 are required, the number of parts is large, the cost is high, and the work of screwing each part to the other part is troublesome. Especially the riser 56
In general, a long steel pipe is cut to an appropriate length on site, and then external threads are formed at both ends, so that additional piping work is required. Also, when the number of parts is large, the possibility of gas leakage at each connection part increases.

The riser tube 56 is usually made of steel, and is provided with zinc plating for rust prevention. However, since the steel pipe is cut to an appropriate length and the outer periphery of the end is threaded to form an external thread, the galvanized portion of the thread is peeled off, and the steel is exposed. In a state where one end of the riser tube 56 is screwed to the elbow 55 and the other end is screwed to the elbow 57, it is general that the male screw is exposed by the amount of the thread for 2-3 pitches. The exposed portion of the male screw is exposed to outside air, sea salt, rainwater, etc., and rusts. As the rust progresses, not only does the screw portion corrode and become brittle, but also the appearance deteriorates due to red rust.

On the other hand, in a piping structure as shown in FIG.
The number of parts is very small and the connection work is easy,
It takes time and effort to fabricate 0. That is, the pipe 70 includes a portion 71 connected to the ball valve 51 and the gas meter 4.
Although it has a portion 72 connected to the gas inlet port 0 and a drain vent portion 73, it is not a substitute that can be integrally molded with a mold. Therefore, the drain vent portion 73 needs to be welded to the portions 71 and 72, and Must be bent at four places. In particular, since the vertical, horizontal, and depth dimensions of each part in the piping system are determined, unless the ball is bent correctly, the ball valve 51 and the gas inlet of the gas meter 40 cannot be connected well.

Further, in the piping structures shown in FIGS. 15 and 16, since the piping of the gas inlet system and the gas outlet system of the gas meter 40 are separated from each other, the piping is vulnerable to external forces such as earthquakes and land subsidence. High possibility of breakage. That is, since the gas meter 40 is only suspended by the pipe, and the pipes of the gas inlet system and the gas outlet system of the gas meter 40 are not supported, the pipe including the gas meter 40 is not subjected to an external force from the viewpoint of safety and stability. It is preferable to use a strong structure.

Accordingly, the present invention has been made in view of these problems, and realizes an improvement in piping workability, a reduction in the number of parts and cost, a reduction in locations where gas can leak, and a structure resistant to external forces. An object is to provide a piping structure around a gas meter.

[0010]

In order to achieve the above object, a piping structure around a gas meter according to the present invention comprises a piping system on a gas supply side and a consumption side, and a gas meter joint to which a gas inlet / outlet of the gas meter is connected. An L-shaped pipe having a gas inlet opening at one end, a gas outlet communicating with the gas inlet and opening at the other end, and a gas inlet section. , A gas lead-out part, and a connecting part connecting the two parts together. The gas introducing part has a gas inlet opening in a direction corresponding to the piping system on the gas supply side, and a gas meter inlet connection communicating with the gas inlet. Having a port, the gas outlet uses a gas meter outlet connection port, and a joint having a gas outlet communicating with the gas meter outlet connection port and opening in a direction corresponding to the piping system on the gas consuming side, Of the joint The gas inlet side and the gas outlet side of the gas meter joint are connected to the gas inlet and the gas outlet side of the gas meter, respectively, the gas outlet of the L-shaped tube is connected to the gas inlet of the joint, and the gas outlet of the joint is connected. And a gas supply side piping system connected to the gas inlet of the L-shaped tube.

[0011] In this piping structure, the L-shaped pipe and the coupling are connected between the piping system on the gas consumption side and the gas supply side, and the gas meter joint to which the gas inlet / outlet of the gas meter is connected. In addition, the number of parts can be reduced, so that the piping workability can be improved, and the possibility of gas leakage can be reduced. In addition to this, since the joint can be made of a casting, it is easy to manufacture, and the L-shaped tube may be bent at one place, so that the manufacturing cost of parts can be suppressed. In addition, since the gas inlet and the gas outlet are integrally connected at the connecting part, the pipes of the gas inlet system and the gas outlet system are integrally fixed. Breakage is prevented and the stability of the gas meter is increased.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments. A piping structure around a gas meter according to one embodiment is shown in FIGS. 1 (perspective view) and 2 (front view). However,
In FIG. 2, the automatic switching pressure regulator 50 and the ball valve 51
Is omitted. Note that the pipe from the LP gas cylinder to the ball valve 51 and the pipe 64 on the gas consuming side may be the same as the conventional one, and a flexible pipe is connected to the gas outlet 32 of the joint 30 described later, and the connection to the gas consuming side is made. In some cases.

The features of this piping structure include a ball valve 51 in the piping system on the gas supply side and a gas meter coupling (in which the cap nut 41 is integrally provided on the gas meter coupling main body) to which the gas inlet / outlet of the gas meter 40 is connected. Between
The first joint 20, the L-shaped pipe 10, the second joint 30, and the L-shaped pipe 42 are connected. The L-shaped tube 10 located between the joint 20 and the joint 30 has a gas inlet 1 opening downward at one end, as shown in a sectional view in FIG.
1 and a gas outlet 12 which communicates with the gas inlet 11 and opens laterally above the gas inlet 11 at the other end. The gas inlet 11 is connected to a joint 20, and the gas outlet 12 is connected to a joint 30. Here, a male screw 13 is formed on the outer periphery of the gas inlet 11, and a male screw 14 is formed on the outer periphery of the gas outlet 12.

The pipe 10 is made of, for example, steel, and is cut and bent to an appropriate length in advance and formed with external threads 13 and 14 at both ends. That is, the tube 10
Vertical portions of the length L ₁ is equivalent to the length obtained by adding the length in the vertical direction of the length and the elbow 57 of the riser 56 in FIG. 15, the length L ₂ is the length in the horizontal direction parts of It is set to about one-third of the L _1. Specifically, a long steel pipe is cut and bent to the appropriate length described above, and the male screw 13, 14 formed on the outer periphery of both ends is subjected to galvanization for rust prevention, thereby obtaining a finished product. Tube 10.

In FIG. 4 (side view), the joint 20 has a gas inlet 21 opening upward,
A gas outlet 22 that opens upward behind the gas inlet 21 and a drain vent 25 that opens downward on the side opposite to the gas inlet 21. Gas inlet 21
A male screw 23 corresponding to a female screw on the inner circumference of the end of the ball valve 51 is provided on the outer circumference of the ball valve 51, and a male screw 13 on the outer circumference of the gas inlet 11 of the pipe 10 is provided on the inner circumference of the gas outlet 22. A female screw (not shown) is formed. This joint 20
Are arranged with the gas inlet 21 on the front side and the gas outlet 22 on the rear side.
Is connected to the gas outlet 22 and the gas inlet 11 of the pipe 10 to the gas outlet 22.
Is connected.

In FIG. 5 (top view (a), front view (b)), the joint 30 has a gas introduction section 31, a gas derivation section 32,
And a connecting portion 33 for connecting the two portions 31 and 32 integrally. The gas introduction part 31 is provided with the gas inlet 3 opening laterally.
5 and a gas meter inlet connection port 36 communicating with the gas inlet 35 and opening forward.
Is a gas meter outlet connection port 37 that opens to the front,
A gas outlet 38 communicates with the gas meter outlet connection port 37 and opens downward.

On the inner periphery of the gas inlet 35, a female screw corresponding to the male screw 14 on the outer periphery of the gas outlet 12 of the pipe 10 is provided, and on the inner periphery of the gas meter inlet connection port 36 and the gas meter outlet connection port 37. A female screw corresponding to a male screw on the outer periphery of the end of the L-shaped pipe 42 to the gas meter joint and a female screw corresponding to a male screw on the outer periphery of the end of the pipe 64 are formed on the inner periphery of the gas outlet 38. Have been. The gas outlet 35 of the pipe 10 is connected to the gas inlet 35 of the joint 30, and the pipe 64 on the gas consuming side is connected to the gas outlet 38. In addition, the gas meter inlet connection port 36 and the gas meter outlet connection port 37
An L-shaped pipe 42 is connected to each of the gas meter joints, and the gas inlet / outlet of the gas meter 40 is connected and fixed to both the L-shaped pipes 42 by a cap nut 41 of the gas meter joint via a gas meter joint main body (not shown).

The on-site piping work using the L-shaped pipe 10 and the joints 20, 30 is performed, for example, as follows. First, after connecting the joints 20 and 30 to the L-shaped pipe 10 in advance, the ball valve 51 is connected to the joint 20, the pipe 64 is connected to the joint 30, and the joint 30 is further connected to the gas meter joint. Is connected, and the gas meter 40 is connected and fixed to the L-shaped tube 42 with the cap nut 41 of the gas meter joint. At this time, since the length of the pipe 10 is appropriately set in advance, there is no need to perform any cutting and threading work on site, and the connection work can be started immediately.

In addition to the on-site piping work, the ball valve 51, the joint 20, the L-shaped pipe 10, and the joint 30 (and the L-shaped pipe 42 as necessary) are integrally assembled at a factory in advance. In some cases, it may be unitized. In this case, the on-site plumbing work is made even more efficient. According to this piping structure, the connection between the ball valve 51 and the L-shaped pipe 42 to the gas meter coupling is made by the L-shaped pipe 10 and the couplings 20 and 30. Therefore, the number of parts is small, and connection work such as screwing is also possible. It will be easier. In addition, since the joints 20 and 30 can be manufactured by molding using a mold, and the pipe 10 can be bent at only one place, parts can be easily manufactured and the cost can be reduced. In addition, since the gas inlet 31 and the gas outlet 32 are integrally connected by the connecting portion 33, the joint 30 has a gas inlet system pipe (pipe 10) and a gas outlet system pipe (pipe 64). ) Are integrally fixed, so that the structure becomes strong against external force, so that the gas meter 40 is prevented from being damaged and the stability of the gas meter 40 is increased.

Further, since the pipe 10 is previously cut and bent to an appropriate length and formed with external threads 13 and 14 at both ends, it is not necessary to cut and thread the pipe on site. In addition to the workability being further improved, the screw portion is covered with plating, so that the screw portion does not rust after piping. The second used in the piping structure of the above embodiment
In the joint 30 of FIG. 1, the number of gas outlets 38 to which the gas consuming side pipe 64 is connected is one corresponding to one pipe 64, but is not limited thereto. 3 having a gas outlet opening in a direction corresponding to
It only needs to be 0. FIG. 6 (top view (a), front view (b)) shows the second joint 30 in a form conforming thereto.
FIG. 7 shows a piping structure using the. The joint 30 in FIG.
It has a gas outlet opening in one, two or three directions corresponding to the piping system on the gas consuming side, and is otherwise exactly the same as the joint 30 in FIG. In other words, if there is only one pipe 64a on the gas consuming side and it extends from below as shown in FIG.
8a is provided (similar to the joint 30 of FIG. 5). Similarly, when one pipe 64b extends from the side, one gas outlet 38b is provided, and when one pipe 64c extends from above, one gas outlet 38c is provided.

When there are two pipes on the gas consuming side, that is, depending on the combination, the pipes 64a and 64b and the pipes 64a and 64
4c and pipes 64b and 64c, two gas outlets 38a and 38b and two gas outlets 38a and 38
c, and gas outlets 38b and 38c are provided, respectively. Further, three pipes on the gas consuming side (pipes 64a, 64b, 6
4c) If there are three gas outlets 38a, 38b,
38c is provided. Thus, the gas outlet of the joint 30 may be provided so as to open in a direction corresponding to the pipe on the gas consuming side.

A piping structure around a gas meter according to another embodiment is shown in FIGS. 8 (perspective view) and 9 (front view). However, in FIG. 9, the automatic switching pressure regulator 50 and the ball valve 51 are omitted. In this piping structure, the second joint 3
The form of 0 'is different. That is, the second joint 30 ′ includes the gas inlet 31, the gas outlet 32, and the connecting portion 33, and both the gas meter inlet connection of the gas inlet 31 and the gas meter outlet connection of the gas outlet 32 face downward. The straight pipe 43 of the gas meter joint is connected to each of the two downwardly open connection ports. Along with this, the gas outlet of the gas outlet 32 is located behind the gas meter outlet connection port.

In the piping structure of this embodiment, the second
As shown in FIG. 10, the joint 30 'may have a gas outlet in a direction corresponding to the pipes 64a, 64b, 64c on the gas consuming side, and the gas outlet may be one, two or three. I do not care. In the above embodiment, the L-shaped pipe 10 is connected to the joints 20 and 30 by screwing, but may be connected by welding. That is, the ports 11 and 12 are inserted into the gas outlet 22 of the joint 20 and the gas inlet 35 of the joint 30, respectively, without forming external threads on the outer periphery of the gas inlet 11 and the gas outlet 12 of the pipe 10. The parts are joined by welding.

FIG. 11 (perspective view) shows a piping structure around a gas meter according to still another embodiment. In this piping structure, the second joint 30 </ b> A includes the gas inlet 31, the gas outlet 32, and the connecting portion 33, and the gas inlet of the gas inlet 31 and the gas outlet of the gas outlet 32 both face downward. It has a left-right symmetrical shape. The gas outlet of the first joint 20 'is open laterally. The gas outlet of the L-shaped pipe 10 is connected to the gas outlet of the first joint 20 ', and the L-shaped pipe 1 is connected to the gas inlet of the second joint 30A.
0 gas outlet is connected.

On the other hand, in the piping structure shown in FIG.
The second joint 30B is a modification of the joint 30. The gas inlet of the gas inlet 31 is opened downward. Others are the same as the piping structure of FIG. The piping structure shown in FIG. 13 is a ball valve 5 in the piping structure of FIG.
1 is provided integrally with the second joint 30A. That is, the ball valve 51 is provided in the gas introduction section 31 of the joint 30A, and the ball valve 51 opens and closes the flow path between the gas inlet and the gas meter inlet connection port. Supply / stop can be operated.

Further, in the piping structure shown in FIG. 14, the structure and connection of the second joint 30B and the L-shaped pipe 10 are shown in FIG.
However, the piping system up to the gas inlet of the L-shaped pipe 10 is different. Here, a pressure regulator 80 is connected to an LP gas cylinder 90 having an opening / closing knob 91, and a hose plug 81 is attached to a gas inlet of the L-shaped tube 10,
The pressure regulator 80 and the hose plug 81 are connected by a high-pressure hose 82.

Further, the piping structure shown in FIG.
In the modified example of the piping structure, a gas inspection port 100 is provided in the gas outlet 32 of the joint 30A, and a stopper 101 is screwed into the gas inspection port 100. When measuring the gas pressure, the stopper 101 is removed, and the measuring instrument is connected to the gas inspection port 100.

[0028]

The piping structure around the gas meter according to the present invention is as follows.
The configuration described above has the following effects. (1) The connection between the piping system on the gas supply side and the consumption side and the gas meter joint to which the gas inlet / outlet of the gas meter is connected by two parts of an L-shaped pipe and a joint, so that the number of parts is reduced. Thus, it is possible to improve the piping workability and to reduce the locations where gas leakage is possible. (2) Since the joint can be cast, it is easy to manufacture, and the L-shaped tube may be bent at one place.
The manufacturing cost of parts can be reduced. (3) In the joint, the gas inlet and the gas outlet are integrally connected at the connecting portion, so that the pipes of the gas inlet system and the gas outlet system are integrally fixed, so that the structure has a strong resistance to external force. The gas meter is prevented from being damaged, and the stability of the gas meter is increased. (4) According to the configuration of claim 3, cutting and threading work is unnecessary on site, and not only the workability is further improved, but also the rust problem after piping because the threaded portion remains plated. Does not happen. (5) According to the configuration of claim 4, one joint can be used for the piping system on the gas consuming side. (6) According to the configuration of the fifth aspect, a connection form corresponding to the piping system on the gas supply side can be taken.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a piping structure around a gas meter according to an embodiment.

FIG. 2 is a partially omitted front view of the piping structure of FIG.

FIG. 3 is a sectional view of an L-shaped pipe used in the piping structure of FIG. 1;

FIG. 4 is a side view of a first joint used in the piping structure of FIG. 1;

5A is a top view of a second joint used in the piping structure of FIG. 1, and FIG. 5B is a front view thereof.

FIGS. 6A and 6B are a top view and a front view showing another embodiment of the second joint used in the piping structure of FIG.

FIG. 7 is a perspective view showing a piping structure around a gas meter using the second joint of FIG. 6;

FIG. 8 is a perspective view showing a piping structure around a gas meter according to another embodiment.

9 is a partially omitted front view of the piping structure of FIG.

FIG. 10 is a perspective view showing a modification of the piping structure of FIG.

FIG. 11 is a perspective view showing a piping structure around a gas meter according to still another embodiment.

FIG. 12 is a perspective view showing a piping structure around a gas meter according to still another embodiment.

FIG. 13 is a perspective view showing a piping structure around a gas meter according to still another embodiment.

FIG. 14 is a perspective view showing a piping structure around a gas meter according to still another embodiment.

FIG. 15 is a perspective view showing a piping structure around a gas meter according to still another embodiment.

FIG. 16 is a perspective view showing a piping structure around a gas meter according to a conventional example.

FIG. 17 is a front view showing a piping structure around a gas meter according to another conventional example.

[Explanation of symbols]

 10 L-shaped pipe 20 (') First joint 30 (', A, B) (Second) joint 38 (ac) Gas outlet 40 Gas meter 42 L-shaped pipe 43 Straight pipe 50 Automatic switching pressure Regulator 51 Ball valve (open / close valve) 64 (ac) Piping on gas consumption side 80 Pressure regulator 81 Hose plug 82 Hose 90 LP gas cylinder 100 Gas inspection port

Claims (7)

[Claims] In a piping structure around a gas meter connecting between a piping system on a gas supply side and a consumption side and a gas meter joint to which a gas inlet / outlet of the gas meter is connected, a gas inlet opening at one end; An L-shaped tube communicating with the gas inlet and having a gas outlet opening at the other end, a gas inlet, a gas outlet, and a connecting portion for integrally connecting the two portions; Has a gas inlet opening in a direction corresponding to the piping system on the gas supply side, and a gas meter inlet connecting port communicating with the gas inlet, and the gas outlet is a gas meter outlet connecting port, and the gas meter outlet connecting port And a joint having a gas outlet opening in a direction corresponding to the piping system on the gas consuming side, using a gas meter inlet connection port and a gas meter outlet connection port of the joint, the gas inlet side of the gas meter joint and Gas outlet of the joint, the gas outlet of the L-shaped pipe is connected to the gas inlet of the joint, the gas outlet of the joint is connected to the gas outlet side of the pipe, and the L-shaped pipe is connected. A piping structure around a gas meter, wherein a piping system on a gas supply side is connected to a gas inlet of the gas meter. 2. A gas meter inlet connection port and a gas meter outlet connection port of the joint are open frontward, and an L-shaped pipe is provided at the gas meter inlet connection port and the gas meter outlet connection port to a gas inlet side and a gas outlet side of the gas meter joint. The piping structure around the gas meter according to claim 1, wherein 3. The gas meter according to claim 1, wherein the L-shaped pipe is cut and bent to an appropriate length in advance, and has threads formed at both ends. Peripheral piping structure. 4. The joint according to claim 1, wherein said joint has a gas outlet opening in one, two or three directions corresponding to a piping system on a gas consuming side. Item 3
Piping structure around the described gas meter. 5. The gas inlet of the joint opens laterally or downward corresponding to a piping system on the gas supply side. Piping structure around the gas meter. 6. A piping system on the gas supply side includes a pressure regulator connected to an LP gas cylinder and an opening / closing valve following the pressure regulator. In addition to the joint (second joint) and an L-shaped pipe, A first joint having a gas inlet opening upward and a gas outlet communicating with the gas inlet and opening upward or sideways, and an open / close valve is provided at the gas inlet of the first joint. The gas outlet of the L-shaped pipe is connected to the gas outlet of the first joint.
Piping structure around the described gas meter. 7. A piping system on the gas supply side has a pressure regulator connected to an LP gas cylinder, and a hose stopper is attached to a gas inlet of the L-shaped tube, and the pressure regulator and the hose stopper are connected. The piping structure around the gas meter according to claim 1, wherein the piping is connected by a hose.