JP2007206002A - Piping for gas meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a certain degree of freedom in the directions of a gas inlet tube and a gas outlet tube without limiting the directions of the gas inlet tube and the gas outlet tube connected to the gas meter, wherein the piping connection in that case is facilitated with simple constitution. <P>SOLUTION: The piping is connected to the gas meter. The piping formed in a U shape includes a bottom part 12 and both leg parts 13, 14 forming the U shape. The piping includes connection ports 19, 20 in the ends of both the leg parts 13, 14, respectively. In the bottom part 12, a first member 15 and a second member 16 rotatable around the axial center 10 of the bottom part 12 are interconnected with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to gas meter piping.

A gas meter has a gas inlet and a gas outlet, and is usually installed outdoors. The gas inlet is connected to a gas inlet pipe through a cock, and the gas outlet is connected to a gas outlet pipe. The gas inlet pipe and the gas outlet pipe are generally provided so as to protrude upward from the ground surface. Then, these gas inlet pipe and gas outlet pipe are connected to a gas inlet and a gas outlet of the gas meter so that the gas inlet pipe and the gas outlet pipe communicate with the gas meter. At this time, the gas inlet and the gas outlet of the gas meter are generally formed upward as with the gas inlet pipe and the gas outlet pipe. For this reason, U-shaped pipe members are used for the connection between the gas inlet pipe and the gas inlet and the connection between the gas outlet pipe and the gas outlet (for example, Patent Document 1).
Japanese Patent Laid-Open No. 9-218070, especially FIG.

  However, when the U-shaped pipe member is used as described above, the gas inlet pipe and the gas outlet pipe inevitably can only be piped upward as described above. In particular, the gas outlet pipe is piped indoors from the gas meter, and it may be more convenient to pipe the gas outlet in a direction other than upward. However, in such a case, the above-mentioned U-shaped pipe member cannot be used, and instead, it is necessary to perform piping using a plurality of elbows or short pipes. For this reason, the piping structure is complicated and a situation in which labor is required for the piping work tends to occur.

  Therefore, the present invention can provide a certain degree of freedom in the direction of the gas inlet pipe and the gas outlet pipe without limiting the directions of the gas inlet pipe and the gas outlet pipe connected to the gas meter, and the piping in that case. An object is to facilitate connection with a simple configuration.

  In order to achieve this object, the present invention is a pipe connected to a gas meter, which is formed in a U shape and has a bottom portion and both leg portions forming a U shape, and a connection port is provided at the tip of each leg portion. The bottom portion has a configuration in which a first member and a second member that are rotatable with respect to each other about an axis of the bottom portion are connected to each other.

  With such a configuration, since the first member and the second member connected to each other can rotate around the axis of the U-shaped bottom, the connection ports at the ends of the U-shaped leg portions. They can point in the same direction, in the opposite direction, or in any other direction. Therefore, by connecting one connection port to a gas meter and connecting the other connection port to a gas inlet pipe or gas outlet pipe, even when the gas inlet pipe or gas outlet pipe is connected in any direction, it is possible Thus, the other connection port can be aligned with the direction of the gas inlet pipe or the gas outlet pipe. Therefore, the direction of the gas inlet pipe and the gas outlet pipe is not limited, and a certain degree of freedom can be given to these directions, and the piping connection in that case can be easily made with a simple configuration.

  In FIG. 4, 1 is a gas meter, 2 is a gas inlet pipe, and 3 is a gas outlet pipe. As shown in the figure, the gas inlet pipe 2 is provided so as to protrude upward from the ground surface, for example, from the ground. For example, as shown by a solid line in FIG. 4, the gas outlet pipe 3 is provided so as to protrude upward from the ground surface in the same manner as the gas inlet pipe 2.

  The gas meter 1 has a gas inlet 4 and a gas outlet 5, and the gas inlet 4 and the gas outlet 5 are formed so as to open upward at the top of the gas meter 1. The upper end of the gas inlet pipe 2 and the gas inlet 4 are joined to each other by a U-shaped connecting pipe 6. The gas inlet pipe 2 is provided with a cock 7 in the vicinity of the connecting pipe 6.

  The gas outlet 5 of the gas meter 1 and the gas outlet pipe 3 piped upward as shown in the figure are connected to each other by a gas meter pipe 11 according to the present invention. The configuration of the gas meter pipe 11 will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the gas meter pipe 11 is formed in a U shape and has a bottom portion 12 and both leg portions 13, 14 constituting the U shape. As shown in FIGS. 1 and 2, the gas meter pipe 11 includes a J-shaped first member 15 and a J-shaped second member 16 which are joined to each other at their ends. Thus, it is configured to be U-shaped as described above. Reference numeral 10 denotes an axis of the bottom 12.

  The first member 15 has an insertion opening 17 formed at the joint end with the second member 16. In addition, the second member 16 has a receiving port 18 into which an insertion port 17 of the first member 15 is inserted at a joint end portion with the first member 15. In the first member 15, a tapered inner screw 19 as a connection port is formed at the end opposite to the side where the insertion port 17 is formed. In the second member 16, a taper inner screw 20 as a connection port is similarly formed at the end opposite to the side where the receiving port 18 is formed. In the first member 15 and the second member 16, hexagonal portions 21 and 22 for tool hooking are formed on the outer periphery of the portion where the tapered inner screws 19 and 20 are formed.

  A first O-ring groove 24, a second O-ring groove 25, and an inner circumferential annular groove 26 having a rectangular cross section are formed on the inner periphery of the receiving port 18 in order from the opening end side. . An outer peripheral annular groove 27 having a rectangular cross section is formed on the outer periphery of the insertion opening 17, and an outer peripheral tapered surface 28 is formed on the distal end of the insertion opening 17. A refractory O-ring 29 is fitted in the first O-ring groove 24. The refractory O-ring 29 is formed of, for example, a rubber material mixed with thermally expandable graphite, so that it can be thermally expanded during a fire or the like to seal between the receiving port 18 and the insertion port 17. is there. An ordinary O-ring 30 formed of nitrile rubber or the like is fitted in the second O-ring groove 25. The O-ring 30 is compressed by the receiving port 18 and the inserting port 17 when the inserting port 17 is inserted into the receiving port 18, and can seal between the receiving port 18 and the inserting port 17. is there. The inner circumferential annular groove 26 of the receiving port 18 and the outer circumferential annular groove 27 of the insertion port 17 are configured to face each other when the insertion port 17 is inserted into the reception port 18. A C-shaped stopper ring 31 is fitted over the inner circumferential annular groove 26 and the outer circumferential annular groove 27 that face each other.

  With this configuration, the gas meter pipe 11 has an inner ring shape in a state where the insertion port 17 of the first member 15 and the receiving port 18 of the second member 16 are sealed with each other by the O-ring 30. The C-shaped stopper ring 31 is fitted over the groove 26 and the outer peripheral annular groove 27 to prevent the insertion port 17 from being pulled out from the receiving port 18, and the first member 15 and the second member 16 are: The O-rings 30 can rotate around each other about the axis 10 of the bottom 12 while being sealed from each other.

  The first member 15 and the second member 16 are joined as follows. That is, as shown in FIG. 2, with the C-shaped stopper ring 31, the ordinary O-ring 30 and the fire-resistant O-ring 29 being deposited inside the receptacle 18, the insertion slot 17 is inserted into the receptacle 18. . Then, the insertion port 17 has its tip passed through the inside of the fireproof O-ring 29 toward the inner side of the receiving port 18, and the ordinary O-ring 30 is expanded by the outer peripheral tapered surface 28 at the tip of the insertion port 17. It passes through the inside and further toward the inner side of the receiving port 18 while elastically expanding the C-shaped stopper ring 31 by the outer peripheral tapered surface 28. When the outer peripheral annular groove 27 of the insertion port 15 faces the inner peripheral annular groove 26 of the receiving port 18, the C-shaped stopper ring 31 is elastically reduced in diameter so that the outer peripheral side portion of the receiving port 18 In a state where the inner circumferential annular groove 26 is stuck, the inner circumferential side portion fits into the outer circumferential annular groove 27 of the insertion opening 17. As a result, the state shown in FIG. 1 is obtained, and the joining of the first member 15 and the second member 16 is completed.

  As a result, the first member 15 and the second member 16 can rotate around the axis 10 of the bottom portion 12 as described above. By performing such rotation, the gas meter pipe 11 can be made U-shaped as shown in FIG. 1 so that the tapered inner screws 19 and 20 can be directed in the same direction. The other inner screw can be directed in a different direction. For example, as shown in FIG. 3 (a), the taper inner screws 19, 20 are directed in opposite directions, and as shown in FIG. 3 (b), the taper inner screws 19, 20 are oriented in a direction of 90 degrees with respect to each other. It can be turned or oriented at any other angle.

  In the example of FIG. 4, the gas inlet pipe 2 and the gas outlet pipe 3 are both disposed on the side of the gas meter 1. As described above, the gas outlet 5 formed upward in the gas meter 1 and the upward gas outlet pipe 3 are connected to each other by the gas meter piping 11 set in a U-shaped direction as shown in FIG. It is connected. Thereby, the gas outlet pipe 3 is piped downward from the gas meter 1.

  4, for example, if the gas meter pipe 11 is set in the direction shown in FIG. 3A, it is possible to join the gas outlet pipe 3 that descends from the upper side as shown in the figure. It is. In other words, this makes it possible to pipe the gas outlet pipe 3 upward from the gas meter 1. If the gas meter pipe 11 is set in the direction shown in FIG. 3B, the gas outlet pipe 3 can be piped forward from the gas meter 1 in the horizontal direction. Similarly, it is possible to pipe the gas outlet pipe 3 backward in the horizontal direction. Alternatively, by arbitrarily rotating the first member 15 and the second member 16 of the gas meter pipe 11 around the axis 10 shown in FIG. It can be piped in the direction. And the piping which gave such a freedom degree can be performed only by using the piping 11 for gas meters of the simple structure shown in FIG.

  FIG. 5 shows an example in which the gas inlet pipe 2 and the gas outlet pipe 3 are piped behind the gas meter 1. Similarly in this case, the gas outlet pipe 3 can be piped in various directions using the gas meter pipe 11.

  As described above, in the piping construction site, it is particularly convenient to set the direction of the gas outlet pipe 3 freely, and it is often required to do so. It is also possible to provide between the gas meter 1. With such a configuration, the gas inlet pipe 2 can be piped in various directions.

It is sectional drawing of piping for gas meters of an embodiment of the invention. It is a figure which shows the assembly method of piping for gas meters of FIG. It is a figure which shows the change of the attitude | position of the piping for gas meters of FIG. It is a figure which shows the usage example of piping for gas meters of FIG. It is a figure which shows the other usage example of piping for gas meters of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Axis center 12 Bottom part 13 Leg part 14 Leg part 15 1st member 16 2nd member 19 Tapered internal thread 20 Tapered internal thread

Claims (1)

  A pipe connected to a gas meter, which is U-shaped, has a U-shaped bottom part and both leg parts, and has a connection port at the end of each leg part. A pipe for a gas meter, characterized in that a first member and a second member that are rotatable around each other are connected to each other around an axis.

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