JP6041385B2 - Gas piping unit - Google Patents

Description

  The present invention relates to a gas pipe unit for connecting a gas meter between a gas supply side pipe and a demand side pipe.

  Conventionally, there has been proposed a gas piping unit having an inlet piping that connects a supply-side piping and a gas meter, and an outlet piping that connects a demand-side piping and a gas meter (see, for example, Patent Document 1). The conventional gas piping unit described in Patent Document 1 has an opening / closing function by providing a gas stopper in the inlet piping, and has a gas leak detection function by providing a pressure detection hole in the outlet piping. .

JP 2001-200998 A

  However, in the gas piping unit described in Patent Document 1, the gas stopper and the pressure detection hole are provided so as to protrude to the front side at a bent portion in which a pipe rising upward in the vertical direction from the gas meter is directed rearward with respect to the gas meter display surface. However, since the dimensions required for the attachment are different, the inlet pipe and the outlet pipe need to be formed by processing differently shaped casings, resulting in an increase in the number of types of parts.

  An object of the present invention is to provide a gas piping unit that can reduce the cost by reducing the types of components.

  A gas piping unit according to the present invention includes an inlet piping unit that connects a gas supply-side piping and an inlet of a gas meter, and an outlet piping unit that connects a gas demand-side piping and an outlet of the gas meter. The inlet pipe unit includes an overall tubular inlet pipe unit main body, an inlet first joint that connects one end of the inlet pipe unit main body to the supply side pipe, and the other of the inlet pipe unit main body. An inlet second joint that connects a side end portion to the inlet of the gas meter, and the outlet pipe unit includes an overall tubular outlet pipe unit main body and one end of the outlet pipe unit main body. A first outlet joint connected to the demand side pipe, and a second outlet joint connecting the other end of the outlet pipe unit main body to the outlet of the gas meter. The inlet piping unit main body is located above the gas meter and extends in the front-rear direction with respect to the display surface of the gas meter, and continues to the front side of the inlet straight portion and has the other side end downward. The outlet pipe unit body is located above the gas meter and extends in the front-rear direction, and is continuous with the front side of the outlet straight part and the outlet straight part. An outlet bent portion that bends the other side end portion downward, a gas stopper is provided in the inlet straight portion, and a pressure detection hole portion is provided in front of the inlet bent portion. It is characterized by.

  According to the present invention as described above, since the gas stopper is provided in the inlet straight portion, the workability when installing the gas stopper is greatly improved as compared with the configuration provided in the inlet bent portion. Since the straight portion is provided with a gas stopper, an increase in outer diameter is suppressed. Accordingly, the dimensions of the inlet straight portion and the outlet straight portion can be unified, the inlet pipe unit main body and the outlet pipe unit main body can be formed by processing a member having a common shape, and the number of parts can be reduced. it can.

  Furthermore, since the pressure detection hole portion has a relatively small mounting dimension and can be provided without increasing the outer diameter of the inlet bent portion, the inlet side piping unit main body and the outlet side piping unit main body are members having a common shape. In addition, the gas piping unit can be provided with a gas leak detection function. Furthermore, by providing a gas stopper and a pressure detection hole in the inlet side piping unit, the degree of freedom in processing to the outlet side piping unit is improved, and for example, it is easy to connect a spare pipe for increasing the supply destination. Become. In addition, when a gas container is connected to the gas supply side pipe via a pressure regulator, a pressure gauge is not provided on the pressure regulator outlet side by providing a pressure detection hole in the inlet side piping unit. Can also measure the pressure near the outlet of the pressure regulator.

  At this time, in the gas piping unit of the present invention, it is preferable that at least one of the front side and the upper side of the outlet bent portion is provided with a thick portion capable of threading.

  According to such a configuration, the above-described preliminary pipe can be easily connected by threading the thick portion.

  According to the gas piping unit of the present invention as described above, the inlet piping unit main body and the outlet piping unit main body are formed by processing a member having a common shape, thereby reducing the number of parts and reducing the cost. A gas piping unit can be provided.

It is a front view of the gas piping unit which concerns on one Embodiment of this invention. It is a top view of the gas piping unit. It is a side view of the said gas piping unit, (A) shows an inlet piping unit, (B) shows an outlet piping unit. It is IV-IV sectional drawing of FIG. 2 of the said inlet piping unit. It is VV sectional drawing of FIG. 2 of the said exit piping unit. It is sectional drawing of the common member of the said inlet piping unit and the said outlet piping unit.

  A gas piping unit according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the gas piping unit 1 of the present invention is used as a part of a gas supply facility that connects a gas supply side piping P1 and a gas demand side piping P2 to a gas meter M. As shown in FIG. 1, a gas piping unit 1 connects an inlet piping unit 2 that connects a gas supply side piping P1 and an inlet M1 of a gas meter M, and a gas demand side piping P2 and an outlet M2 of the gas meter M. The outlet pipe unit 3, the fixing member 4 that fixes the inlet pipe unit 2 and the outlet pipe unit 3 to each other, and the fixing fitting 5 that fixes the fixing member 4 to a wall or the like.

  The gas supply side pipe P1 and the gas demand side pipe P2 rise in a vertical direction (direction indicated by an arrow Z in the figure) along a wall surface of a building or the like (not shown), and move left and right (arrows in the figure) toward the wall surface. The inlet piping unit 2 and the outlet piping unit 3 are connected to the upper end portions thereof, respectively. As shown in FIG. 2, the inlet piping unit 2 and the outlet piping unit 3 extend in the front-rear direction (direction indicated by the arrow Y in the figure) from the wall surface toward the display surface M3 of the gas meter M, and the front side and the lower side thereof. A gas meter M is attached to the side.

  As shown in FIGS. 3A and 4, the inlet piping unit 2 has an overall tubular inlet piping unit main body 21 and one end (rear side) end of the inlet piping unit main body 21 connected to the supply side piping P <b> 1. An inlet first joint 22 that connects the other end (front side) of the inlet pipe unit main body 21 to the inlet M1 of the gas meter M, and a gas plug 24 that opens and closes the gas pipe. And a pressure detecting plug 25 for inspecting the gas pressure, and the inlet first joint 22 and the inlet second joint 23 enter the inlet through the engagement ring 223 and the stop ring 8 so as not to fall off. The pipe unit main body 21 is attached to both end openings.

  As shown in FIGS. 3B and 5, the outlet pipe unit 3 has an overall tubular outlet pipe unit main body 31 and one end (rear side) end of the outlet pipe unit main body 31 connected to the demand side pipe P2. And an outlet second joint 33 that connects the other end (front side) end of the outlet pipe unit main body 31 to the outlet M2 of the gas meter M. The outlet first joint 32 and The outlet second joint 33 is attached to both opening portions of the outlet pipe unit main body 31 through the engagement ring 223 and the stop ring 8 so as not to drop off.

  Further, as shown in FIGS. 3A and 4, the inlet piping unit main body 21 includes an inlet straight portion 211 extending in the front-rear direction (direction indicated by an arrow Y in the figure), and a rear side of the inlet straight portion 211 in the Y direction. An inlet rear bent portion 212 bent downward on the side, an inlet first falling portion 213 extending downward from the inlet rear bent portion 212 to which the inlet first joint 22 is attached, and the Y direction of the inlet straight portion 211 An inlet front bent portion 214 as an inlet bent portion bent downward on the front side, and an inlet second falling portion 215 that extends downward from the inlet front bent portion 214 and to which the inlet second joint 23 is attached. It is configured. A gas stopper mounting portion 26 is formed on the upper side of the inlet straight portion 211 in the Z direction, and a pressure detection hole portion 252 having a pressure detection hole 251 is formed on the front side of the inlet front side bent portion 214 in the Y direction. An inlet opening 27 that opens toward the rear side in the Y direction is formed at 212, and the inlet opening 27 is sealed with a lid member 7.

  As shown in FIGS. 3B and 5, the outlet piping unit main body 31 includes an outlet straight portion 311 extending in the front-rear direction (Y direction in the figure) and a rear side of the outlet straight portion 311 in the Y direction. A bent outlet rear bent portion 312, an outlet first falling portion 313 that extends downward from the outlet rear bent portion 312 and to which the outlet first joint 32 is attached, and downward on the Y direction front side of the outlet straight portion 311. An outlet front bent portion 314 as a bent outlet bent portion and an outlet second falling portion 315 that extends downward from the outlet front bent portion 314 and to which the outlet second joint 33 is attached are configured. A thick portion 34 is formed on the front side in the Y direction of the outlet front side bent portion 314, a thick portion 35 is formed on the upper side in the Z direction of the outlet front side bent portion 314, and the rear side bent portion 312 has a rear side in the Y direction. An outlet opening 36 that opens toward the top is formed, and the outlet opening 36 is sealed with a lid member 7.

  The inlet piping unit main body 21 and the outlet piping unit 31 are respectively formed by cutting or drilling the common member 8. The common member 8 is cast using, for example, two types of zinc alloy die casting (ZDC2).

  As shown in FIGS. 1 and 2, the fixing metal 5 is formed by bending or punching an L-shaped metal plate, and has a long hole in the front-rear direction (Y direction in the figure). The fixing member fixing hole 51 formed, and two gas piping unit fixing holes 52 formed in the upper left and right direction (X direction in the figure) and one in the lower left and right direction center are provided. It is configured. The fixing bracket 5 is fixed to the fixing member 4 by a fixing tool such as a bolt or a nut through the fixing member fixing hole 51 according to the distance from the wall surface of the building (not shown), and through the gas piping unit fixing hole 52. It is fixed to a wall surface of a building (not shown) by a fixing tool such as a wood screw.

  As shown in FIG. 4, the gas plug 24 includes a ball valve 241 that can be switched between an open position that connects the gas flow paths at both ends and a closed position that blocks the gas flow path, a cock 242 that is an operation unit, 242 and the ball valve 241 are configured to have a shaft portion 243 that non-rotatably connects the shaft portion 243. The shaft portion 243 is rotatably supported by a bearing portion 261 formed on the gas plug mounting portion 26, and an airtightness is maintained between the shaft portion 243 and the bearing portion 261 by an O-ring 244. By operating the cock 242, the ball valve 241 is switched between an open position and a closed position, and the gas flow path in the gas piping unit 1 can be opened and closed.

  As shown in FIG. 4, the pressure detection plug 25 includes a pressure detection plug body 253, a ball 254 that blocks the inside of the gas piping unit 1 and the outside air, and an O-ring 255 that is disposed on the front side in the Y direction with respect to the ball 254. The ball 254 is connected to the pressure detection plug body 25 and has a coil spring 256 that urges the balls 254 toward each other and a cap 257 that covers the pressure detection plug body 253. When performing pressure measurement or airtight measurement, the cap 257 is removed, a quick joint (not shown) is connected to the pressure detection plug main body 253, and measurement is performed by a pressure gauge or an airtight measuring instrument provided on the downstream side of the quick joint. When the measurement is not performed, the pressure detection plug main body 253 is covered with the cap 257 so as to be protected from external impacts, contamination, and the like.

  Next, the processing applied to the common member 8 when forming the inlet piping unit main body 21 and the outlet piping unit main body 31 will be described.

  As shown in FIG. 6, the common member 8 includes a thick portion 81 for forming the gas stopper mounting portion 26, and a thick portion 82 located on the front side in the Y direction of the inlet front bent portion 214 and the outlet front bent portion 314. And a thick portion 83 located on the upper side in the Z direction of the inlet front bent portion 214 and the outlet front bent portion 314. When forming the inlet piping unit main body 21, the thick portion 81 is cut to form the gas stopper mounting portion 26, the thick portion 82 is threaded to form the pressure detection hole portion 252, and the thick portion 83. Is cut. On the other hand, when the outlet pipe unit main body 31 is formed, the thick part 81 is cut, and the thick part 82 and the thick part 83 are not processed, and become the thick part 34 and the thick part 35 that can be post-processed, respectively. .

  According to this embodiment, there are the following effects.

  That is, since the mounting dimension is reduced by providing the gas plug 24 at the inlet straight portion 211, the dimensions of the inlet straight portion 211 and the outlet straight portion 311 can be unified, and the inlet piping unit main body 21 and the outlet piping unit. Since the main body 31 is formed by processing the common member 8, the types of parts can be reduced and the types of molds for casting can be reduced, so that the cost can be reduced.

  Furthermore, since the pressure detection hole 252 is provided in the inlet pipe unit main body 21, the degree of freedom in processing the outlet pipe unit main body 31 is increased. At this time, the thick portion 34 and the thick portion 35 are provided in the outlet front-side bent portion 314, and for example, it is possible to perform a threading process to connect the preliminary pipe. Further, when a gas container (for example, a high-pressure LP gas cylinder) is connected to the gas supply side pipe P1 via a pressure regulator, the pressure detection hole 252 is provided in the inlet side pipe unit main body 21. Even if no pressure gauge is provided on the outlet side of the pressure regulator, the pressure near the outlet of the pressure regulator can be measured.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.

  For example, in the above-described embodiment, the pressure detection hole 252 is provided in the inlet pipe unit main body 21, but the pressure detection hole 252 may be provided only in the outlet pipe unit main body 31 or provided in both. It may be done.

  In the above-described embodiment, the thick portion 34 and the thick portion 35 are provided on the outlet front bent portion 314. However, at least one of the thick portion 34 and the thick portion 35 is omitted in the casting stage. Alternatively, it may be cut after casting, and if omitted at the casting stage, the amount of members to be used can be reduced, and if omitted or cut, the thick portion 34 and the thick portion 35 are used. Since there are no protrusions, the design can be improved and the weight can be reduced.

  In the embodiment, the outlet pipe unit main body 31 has a configuration in which the thick portion 81 is cut. However, the cutting may not be performed. If the cutting is not performed, the number of manufacturing steps is reduced and the cost is reduced. can do.

  In the above embodiment, the common member 8 is cast. However, the common member 8 may be formed by bending or cutting a pipe. The cost can be reduced by reducing the pattern.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.

  Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

DESCRIPTION OF SYMBOLS 1 Gas piping unit 2 Inlet piping unit 3 Outlet piping unit M Gas meter P1 Gas supply side piping P2 Gas demand side piping 21 Inlet piping unit main body 22 Inlet 1st joint 23 Inlet 2nd joint 24 Gas plug 252 Detection hole 31 Outlet piping unit main body 32 Outlet first joint 33 Outlet second joint 34 Thick part 35 Thick part 211 Inlet straight part 214 Inlet front bent part (inlet bent part)
311 Exit straight portion 314 Exit front bent portion (exit bent portion)

Claims (2)

An inlet piping unit connecting the gas supply side piping and the gas meter inlet;
A gas piping unit comprising an outlet piping unit connecting a gas demand side piping and an outlet of a gas meter,
The inlet pipe unit includes an overall tubular inlet pipe unit main body, an inlet first joint that connects one end of the inlet pipe unit main body to the supply pipe, and the other end of the inlet pipe unit main body. An inlet second joint connected to an inlet of the gas meter,
The outlet pipe unit includes an overall tubular outlet pipe unit main body, an outlet first joint for connecting one end of the outlet pipe unit main body to the demand side pipe, and the other end of the outlet pipe unit main body. An outlet second joint connected to the outlet of the gas meter,
The inlet piping unit main body is located above the gas meter and extends in the front-rear direction with respect to the display surface of the gas meter, and continues to the front side of the inlet straight portion and bends the other side end downward. An inlet bend, and
The outlet pipe unit main body is positioned above the gas meter and extends in the front-rear direction, and an outlet bent portion that is continuous with the front side of the outlet straight portion and bends the other side end downward. Formed with
The inlet straight portion is provided with a gas stopper,
A gas piping unit, wherein a pressure detection hole is provided on the front side of the inlet bent portion.   2. The gas piping unit according to claim 1, wherein at least one of a front side and an upper side of the outlet bent portion is provided with a thickened portion capable of being threaded.

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