JPH09257200A - Piping method of gas meter and gas cock used in this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the pipe arranging cost, when the diameter of the mouthpiece at inlet/ output sides of a gas meter is smaller than that of the piping, by using a gas cock, whose inlet side diameter is equal to that of the inlet side piping, while whose outlet side diameter is equal to that of the mouthpiece on the gas meter inlet side, in addition to a different- diameteral connecting pipe, whose inlet side diameter is equal to that of the mouthpiece on the gas meter outlet side, while whose outlet side diameter is equal to that of the outlet side piping. SOLUTION: The diameter of a gas inlet port 21 of a gas cock 20 is one inch, while the diameter of a gas outlet port 22 is 3/4 inches. In this case, the gas cock 20 is put in place horizontally as follows: as for the inlet side of a gas meter 5, the cock 20 is connected with the tip of an elebow 23, by which the direction of the top end of an inlet side riser pipe 1 is turned to the horizontal, while as for the outlet side, the cock 20 is connected to an inlet side mouthpiece 5a of the gas meter 5 via a 90 deg. elebow (circular short bent pipe) 24 by using a union 25. A different-diameter connecting pipe 26 is provided with a testing port 27. A perpendiociar inlet port 28 is connected with an outlet side mouthpiece 5b, while a horizontal outlet port 29 is connected with an outlet side riser pipe 2 using an elebow 31. Accordingly, it becomes unnecessary to install a gas cock in the inlet side riser pipe and to install a sleeve with a testing port in the outlet side riser pipe, thereby saving the trouble of arranging a pipe or reducing the cost of arranging the pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas meter piping method attached to a general city gas consumer and a gas plug used in this piping method.

[0002]

2. Description of the Related Art In supplying city gas, a gas meter is installed between a supply pipe branched from a main / branch pipe and a pipe extending indoors. Fig. 9 shows an example of installation of this gas meter, where 1 is a branch pipe from the main / branch pipe, and an inlet side start-up pipe is a ground supply pipe that is piped through the ground to the ground. It is an outlet side rising pipe that is erected from the ground, and the tip of this outlet side rising pipe 2 reaches a gas plug inside a room from a header 3 via a flexible pipe 4, for example.

Reference numeral 5 is a gas meter suspended by the inlet-side rising pipe 1 and the outlet-side rising pipe 2, and this gas meter 5
The inlet side mouthpiece 5a and the inlet side riser tube 1 are connected via a bend pipe 6 and an elbow 7, and the outlet side mouthpiece 5b and the outlet side riser tube 2 are
It is connected through a bend pipe 6a and an elbow 7a.

In the figure, 8 is a gas plug called a main plug attached to the inlet side riser pipe 1, and 9 is a sleeve with a test port (purge port) 9a attached to the outlet side riser pipe 2. hand,
The airtightness test or purge is performed by the test port 9a.

[0005]

The gas meter is installed when the diameters of the inlet side cap 5a and the outlet side cap 5b of the gas meter 5 and the diameters of the inlet side riser pipe 1 and the outlet side riser pipe 2 are the same. However, in the low calorie gas supply area, the difference in diameter between the inlet side pipe 5a and the outlet side pipe 5b of the gas meter 5 with respect to the inlet side riser pipe 1 and the outlet side riser pipe 2. Is occurring. For example, in the case of a general consumer, the inlet side riser pipe 1 and the outlet side riser pipe 2 have a diameter (taper screw) of 1 inch, but the inlet and outlet caps (taper screw) of the gas meter 5 are used.
The diameters of 5a and 5b are 3/4 inch.

Therefore, conventionally, a 3/4 inch pipe 10 is used between the inlet side cap 5a and outlet side cap 5b of the gas meter 5 and the elbows 7 and 7a to adjust the diameter. But,
When each 3/4 inch pipe 10 is used as described above, there are disadvantages that the number of piping components is increased, the piping is troublesome, and the piping cost is increased. An object of the present invention is to reduce the number of parts and the cost of piping by reducing the number of parts as compared with the conventional piping example (gas meter installation example).

[0007]

In order to solve the above problems, the present invention provides a gas meter piping method as described below and a gas plug used in this piping method.

[0008] 1. When the inlet / outlet diameter of the gas meter is smaller than that of the inlet / outlet pipe of the gas meter, the inlet side of gas is the same as the inlet side pipe, and the outlet side has a different diameter connection port of the inlet side mouthpiece of the gas meter. Perform gas meter inlet side piping using a gas stopper.On the gas meter outlet side, the gas inlet side is the same as the gas meter outlet side mouthpiece, and the outlet side is a different diameter connecting pipe with the same diameter as the outlet side pipe. Gas meter piping method to be used. 2. A gas plug in which a gas inlet is set to have a large diameter and a gas outlet is set to have a diameter smaller than that of the gas inlet, and a closure is incorporated in a gas flow path connecting the inlet and the outlet.

In the above invention, the gas plugs include those having a straight center line connecting the gas inlet side and the gas outlet side, those having a right angle, and those having a 90 ° bend, and the closure having a tapered shape. , Ball valves, and this type of rotation of the closure includes both manual operation using a handle and automatic operation using electricity.

[0010]

The gas entering the gas meter from the inlet side riser pipe through the gas plug is measured here and reaches the indoor through the different diameter connecting pipe and the riser pipe. The gas plug functions as an elbow and a main plug (meter cock), and the different-diameter connecting pipe also functions as an elbow and a test port or a purge port.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment] FIG. 1 is a front view showing an example of implementing the present invention. FIG. 2 is a left side view and FIG. 3 is a right side view.
1 to 3, 1 is an inlet riser pipe, 2 is an outlet riser pipe, 5 is a gas meter, 5a is an inlet side cap, and 5b is an outlet side cap.

Reference numeral 20 denotes a gas plug according to the present invention. The gas inlet 21 of the gas plug 20 has a diameter of 1 inch and the gas outlet 22 has a length of 3/4 inch, and each has a taper screw. . The gas plug 20 is horizontally mounted on the inlet side of the gas meter 5 after the upper end of the inlet-side rising pipe 1 is horizontally turned by using an elbow 23.
The outlet side is connected to the inlet side cap 5a of the gas meter 5 using a union 25 by a 90 ° curved short tube 24 having a 3/4 inch diameter.

Reference numeral 26 denotes a different-diameter connecting pipe interposed between the outlet side of the gas meter 5 and the outlet-side rising pipe 2, and the different-diameter connecting pipe 26 is provided with a test port 27. The vertical inlet 28 is connected to the outlet base 5b of the gas meter 5 by using the union 30, and the horizontal outlet 29 is provided.
The outlet riser pipe 2 is connected with an elbow 31.

FIG. 4 is a cross-sectional view of the gas plug 5 used in the above-mentioned piping, in which a closure 32 is incorporated between the gas inlet 21 and the gas outlet 22 and the closure 32 is opened and closed by a handle 33. is there.

FIG. 5 shows the gas outlet 22 of the gas plug 5.
The side is downward, and the closure 32 and the handle 33 are upwards. In FIG. 6, the gas inlet 21 side is bent 90 ° and the gas outlet 22 is downward, and the closure 32 and the handle 33 are frontward. In FIG. 7, the closure 32 and the handle 33 are 45 °
This is an example of facing front (up).

In FIG. 8, the gas meter 5 is positioned between the inlet-side rising pipe 1 and the outlet-side rising pipe 2, and the gas plug 5 and the different diameter connecting pipe 2 are arranged.
In this example, the gas meter 5 is swung inward by about 30 ° so that the gas meter 5 approaches the outer wall of the house and the amount of protrusion of the gas meter 5 is reduced.

[0017]

As described above, according to the present invention, the gas plug is replaced with the conventional elbow in the inlet pipe of the gas meter by performing the piping using the gas plug and the connecting pipe having different diameters on the inlet side and the outlet side. Also functions as a connecting pipe, and in the outlet pipe,
The different diameter connecting pipe with test port also functions as a connecting pipe to replace the elbow. As a result, there is no need to attach a gas stopper (main stopper) in the middle of the inlet side riser pipe and a sleeve with a test port in the middle of the outlet side riser pipe as in the past, which saves the labor of piping and makes Two elbows are no longer required on the exit side,
Therefore, the piping cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of an example in which a gas meter is installed according to the present invention.

FIG. 2 is a left side view of an example in which a gas meter is installed according to the present invention.

FIG. 3 is a right side view of an example in which a gas meter is installed according to the present invention.

FIG. 4 is an explanatory view of a gas plug according to the present invention.

FIG. 5 is an explanatory view of a gas plug whose outlet side faces downward.

FIG. 6 is an explanatory view of a gas plug with a closure and a handle facing front.

FIG. 7 is an explanatory view of a gas plug with a closing member and a handle facing diagonally at 45 °.

FIG. 8 is an explanatory diagram of an example in which a gas meter is installed close to an outer wall.

FIG. 9 is an explanatory diagram of an installation example (piping example) of a conventional gas meter.

[Explanation of symbols]

 1 inlet side rising pipe 2 outlet side rising pipe 5 gas meter 5a inlet side cap 5b outlet side cap 20 gas plug 21 gas inlet 22 gas outlet 23 elbow 24 short pipe 25 union 26 different diameter connecting pipe 27 test port 28 flow Inlet 29 Outlet 30 Union 31 Elbow 32 Closer 33 Handle

Claims (2)

[Claims] 1. When the inlet / outlet diameter of the gas meter is smaller than that of the inlet / outlet pipe of the gas meter, the inlet diameter of the gas is the same as that of the inlet pipe, and the outlet diameter is the same as that of the inlet / outlet of the gas meter. The gas meter inlet side piping is performed using a gas plug having a diameter connection port.The gas meter outlet side has the same gas inlet side as the gas meter outlet side mouth, and the outlet side has the same diameter as the outlet side pipe. Piping method of gas meter using connecting pipes with different diameters. 2. A gas inflow port is set to have a large diameter and a gas outflow port is set to have a smaller diameter than that of the inflow port, and a closure is incorporated in a gas flow path connecting the inflow port and the outflow port. Gas tap.