JP2014163418A - Gas piping unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas piping unit which has compatibility to a plurality of kinds of supply-side piping and demand-side piping which are different in diameters.SOLUTION: Since the narrowing of a gas flow passage of a bent part can be prevented by the fact that a gas cock 24 is arranged at an inlet linear part 211, a pressure loss can be reduced as a whole, and a corresponding gas flow rate can be increased. Furthermore, since inside-diameter expanded joint receivers 218 are arranged at side ends of gas meters M of an inlet piping unit 2 and an outlet piping unit 3, inside diameters of an inlet first joint 22 and an outlet first joint 32 can be set conforming to gas supply-side piping P1 and gas demand-side piping P2, and parts can be standardized with respect to a plurality of kinds of the gas supply-side piping P1 and the gas demand-side piping P2 which are different in diameters.

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 pipe for connecting a supply side pipe and a gas meter and an outlet pipe for connecting a demand side pipe and a gas meter, and provided with a fixing member for fixing these pipes to each other. (For example, refer to Patent Document 1). In the conventional gas piping unit described in Patent Document 1, since the interval between the inlet pipe and the outlet pipe is determined by the fixing member, the width determining work is not required at the time of attachment, and the workability at the time of construction is improved.

JP 2001-200998 A

  However, in the gas piping unit described in Patent Document 1, it is necessary to set the piping size according to the gas flow rate (that is, according to the diameter of the supply side piping and the demand side piping), and the types of parts are There was an inconvenience of increasing.

  An object of the present invention is to provide a gas piping unit having compatibility with a plurality of types of supply-side piping and demand-side piping having different diameters.

  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 and the outlet pipe unit are respectively an overall tubular pipe unit main body, and a first joint that connects one end of the pipe unit main body to the supply side pipe or the demand side pipe. A second joint that connects the other end of the piping unit main body to an inlet or an outlet of the gas meter, and the piping unit main body is located above the gas meter and displays the gas meter. A straight portion extending in the front-rear direction with respect to the surface, a front bent portion that is continuous with the front side of the straight portion and bends the other end portion downward, A rear bent portion that is continuous with the rear side of the straight line portion and bends the one side end portion downward, and is formed at least one of the inlet pipe unit and the outlet pipe unit, The straight portion is provided with a gas stopper, and the straight portion has a rear inner diameter including the attachment position of the gas stopper larger than an inner diameter of the front side of the attachment position, and the one end of the pipe unit body The part can be attached by inserting the first joint inside, and a joint receiving part having an enlarged inner diameter is formed, and the rear bent part has an opening that opens toward the rear side. And a lid member that closes the opening.

  According to the present invention as described above, by providing the gas stopper at the straight line portion, it is possible to prevent the gas flow path from being narrowed in the bent portion that determines most of the pressure loss of the entire gas piping unit. Yes. Therefore, compared to a configuration in which a gas stopper is provided at the bent portion, the overall pressure loss can be reduced, the gas flow rate that can be handled is increased, and it can be used for a large-diameter pipe. Further, the pressure loss can be further reduced by increasing the inner diameter of the straight portion at the gas stopper mounting position.

  Furthermore, by inserting the first joint through the joint receiving portion, the first joint can appropriately set the wall thickness at the inserted position and match the inner diameter with the supply side pipe and the demand side pipe. At this time, since the inner diameter of the joint receiving portion is enlarged, the inner diameter of the first joint can be adjusted to be equal to or less than other parts of the pipe unit main body, and the other of the pipe unit main body can be increased without increasing the pressure loss. It can be connected to a supply side pipe and a demand side pipe having an inner diameter equal to or less than that of the part. Therefore, by selecting the first joint according to the supply side pipe and the demand side pipe, the common pipe unit body and the second joint can be used for these pipes having different diameters, reducing the number of parts. And cost can be reduced.

  In addition, since the opening that opens toward the rear side is formed in the rear bent portion, it is possible to work inside the pipe from the opening, and the valve portion of the gas plug is inserted through the opening to allow gas to flow. Since the plug can be attached, assemblability is improved. Furthermore, since the structure can be simplified by closing the opening with the lid material, the inner diameter of the linear portion is not narrowed, and the increase in pressure loss is suppressed, so the gas flow rate is reduced. Can be secured. Also, for example, when the piping unit body is formed by casting, a mold for forming a straight portion can be inserted from the opening, and compared with a configuration in which no opening is formed in the rear bent portion, The structure can be simplified and the cost can be reduced. Here, since the inner diameter on the rear side including the mounting position of the gas stopper in the straight portion is formed larger than the inner diameter on the front side of the mounting position, it is possible to prevent interference with the mold during die cutting. Moreover, the design property can be ensured because the lid member is provided on the rear side.

  At this time, in the gas piping unit of the present invention, it is preferable that a fixing member for fixing the gas piping unit to the rear structure is attached to the front side of the attachment position of the linear portion.

  According to such a configuration, the fixing member is attached to the linear portion on the front side of the attachment position of the gas stopper, and the gas pipe unit is fixed to the structure on the rear side, so that the gas meter is attached to the attachment position of the gas stopper. The load due to weight is not applied, the straight portion can be formed thin, and the inner diameter can be further increased to reduce pressure loss.

  Furthermore, in the gas piping unit of the present invention, the first joint is selected by selecting either a normal joint for a normal flow rate or a large flow rate joint for a large flow rate larger than the normal joint. It is preferable to be configured to be attachable to the main body.

  According to such a configuration, by selecting the first joint from the normal joint and the joint for large flow rate, it is possible to easily connect to the supply side piping and the demand side piping of the normal flow rate or the large flow rate.

  According to the gas piping unit of the present invention as described above, a gas stopper is provided at the straight portion, and by selecting the first joint, a plurality of types of supply-side piping and demand-side piping having different diameters are used. An interchangeable 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 which expands and shows the principal part 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 supplies an inlet piping unit main body 21 as a whole tubular piping unit main body and one end (rear side) end of the inlet piping unit main body 21. An inlet first joint 22 as a first joint connected to the side pipe P1 and an inlet second joint as a second joint connecting the other side (front side) end of the inlet pipe unit main body 21 to the inlet M1 of the gas meter M 23, a gas plug 24 for opening and closing the gas pipe, and a pressure detecting plug 25 for inspecting the gas pressure. The inlet first joint 22 and the inlet second joint 23 are connected to each other. Via the coupling ring 223 and the stop ring 8, the inlet pipe unit main body 21 is attached to both end openings of the inlet pipe unit main body 21 so as not to drop off.

  As shown in FIGS. 3B and 5, the outlet piping unit 3 demands an outlet piping unit main body 31 as a whole tubular piping unit main body and one end (rear side) end of the outlet piping unit main body 31. The outlet first joint 32 as a first joint connected to the side pipe P2 and the outlet second joint as a second joint for connecting the other end (front side) end of the outlet pipe unit main body 31 to the outlet M2 of the gas meter M. 33, the outlet first joint 32 and the outlet second joint 33 are attached to the opening portions at both ends of the outlet pipe unit main body 31 through the engagement ring 223 and the stop ring 8 so as not to fall off. Yes.

  As shown in FIGS. 3A and 4, the inlet piping unit main body 21 includes an inlet straight portion 211 as a straight portion extending in the front-rear direction (the direction indicated by the arrow Y in the figure), and the inlet straight portion 211. The inlet rear bent portion 212 as a rear bent portion bent downward on the Y direction rear side, and the inlet first falling portion to which the inlet first joint 22 is attached extending downward from the inlet rear bent portion 212. 213, an inlet front bent portion 214 as a front bent portion bent downward on the Y direction front side of the inlet straight portion 211, and an inlet second joint to which the inlet second joint 23 is attached extending downward from the inlet front bent portion 214. And a falling portion 215. 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 as an opening that opens toward the rear side in the Y direction is formed in 212, and the inlet opening 27 is sealed with a lid member 7.

  As shown in FIGS. 3B and 5, the outlet pipe unit main body 31 includes an outlet straight portion 311 as a straight portion extending in the front-rear direction (Y direction in the drawing) and the rear side of the outlet straight portion 311 in the Y direction. The outlet rear bent portion 312 as the rear bent portion bent downward at the outlet, the 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 the outlet straight line. An outlet front bent portion 314 as a front bent portion bent downward on the Y direction front side of the portion 311, and an outlet second falling portion 315 extending downward from the outlet front bent portion 314 to which the outlet second joint 33 is attached , And is configured. An outlet opening 35 serving as an opening that opens toward the rear side in the Y direction is formed in the outlet rear bent portion 312, and the outlet opening 35 is sealed with a lid member 7.

  The inlet piping unit main body 21 and the outlet piping unit 31 are formed by casting or drilling, for example, after being 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. The fixing member 4 is fixed by bolts 44 and nuts 45 to fixing pieces 216 and 316 formed on the front side in the Y direction with respect to the gas stopper 24 mounting positions of the straight portions 211 and 311.

  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. At this time, the outer diameter of the ball valve 241 has substantially the same inner diameter as that of the inlet straight portion 211, and the ball valve 241 prevents the gas flow path from being narrowed as much as possible. The gas stopper 24 is assembled by connecting a ball valve 241 inserted into the inlet straight portion 211 from the inlet opening 27 and an external cock 242 via a shaft portion 243. The inlet straight portion 211 is formed with an inner diameter larger than that of the front side at the attachment position of the gas stopper 24 and the rear side thereof.

  Next, the configuration near the inlet first joint 22 will be described. In addition, since this structure is common in the inlet piping unit 2 and the outlet piping unit 3, description about the outlet piping unit 3 is abbreviate | omitted below.

  As shown in FIGS. 4 and 6A, the inlet first falling portion 213 is formed with a joint receiving portion 218 in which the inlet first joint 22 is inserted from the inside and the inner diameter is enlarged. . The inlet first joint 22 includes a meter side connection part 221 inserted through the joint receiving part 218 and a pipe side connection part 222 connected to the gas supply side pipe P1. The meter side connection portion 221 is provided with an elastically deformable engagement ring 223 that protrudes radially outward, and an engagement receiving portion 217 that is a concave groove that circulates in the radial direction is provided inside the joint receiving portion 218. Provided. By engaging the engagement ring 223 with the engagement receiving portion 217, the inlet first joint 22 is rotatably supported by the inlet pipe unit main body 21 with a rotation axis parallel to the Z direction.

  Next, the case where the gas pipe unit 1 is connected to the gas supply side pipe P1 and the gas demand side pipe P2 having different inner diameters will be described.

  In FIG. 6, (A) shows the case where the gas supply side pipe P1 is for a normal flow rate, and (B) shows the case for a large flow rate. For example, the size for normal flow rate is 15A (internal diameter standard), And 20A is illustrated as a size for large flow rates. The inlet first joint 22 is selected from either a normal joint 22a shown in FIG. 6 (A) or a large flow joint 22b shown in FIG. 6 (B), and is attached to the joint receiving portion 218 of the inlet pipe unit main body 21. It is done. The normal joint 22a and the large flow joint 22b have a common outer diameter that is substantially the same as the joint receiver 218 at the pipe-side connecting portion 222, and are substantially the same as the inner diameter of the joint receiver 218 at the meter-side connecting portion 221. On the other hand, each has an inner diameter adapted to the gas supply side pipe P1. That is, the normal joint 22a and the large flow joint 22b have a common outer diameter by adjusting the thickness at the meter side connection part 221 and the pipe side connection part 222, and the inner diameter matches the gas supply side pipe P1. It has been. The demand side piping unit 3 has the same configuration.

  According to this embodiment, there are the following effects.

  That is, since the gas stopper 24 is provided in the inlet straight portion 211, the inlet front bent portion 214 is not narrowed by the ball valve 241, and the pressure loss of the entire gas piping unit 1 can be reduced. Therefore, the gas flow rate that can be dealt with can be increased. For example, the gas flow rate of 20A size can be accommodated while having substantially the same outer diameter as a conventional 15A size gas piping unit. At this time, by using the inlet first joint 22 and the outlet first joint 32 with appropriate wall thicknesses, other than these joints are common to the gas supply side pipe P1 and the gas demand side pipe P2 of different diameters. The gas piping unit 1 can be connected, and the number of parts can be reduced and the cost can be reduced.

  Furthermore, since the gas valve 24 can be attached by inserting the ball valve 261 into the inlet straight portion 211 from the inlet opening 27, assembly is easy. Further, since the inlet opening 27 is sealed with the lid member 7, the structure near the inlet rear side bent portion 212 can be simplified, and the inlet straight portion 211 and the inlet first falling portion 213 are narrowed. This prevents the gas flow rate from being reduced.

  Further, the inlet straight portion 211 has an inner diameter larger than that of the front side at the mounting position of the gas plug 24 and the rear side of the mounting position (a step is formed). Narrowing of the inner diameter is suppressed, and pressure loss can be reduced. Furthermore, the workability at the time of assembling the gas stopper 24 is ensured because the inner diameter is enlarged on the rear side of the mounting position.

  In addition, the fixing member 4 is fixed to the front side of the attachment positions of the straight portions 211 and 311 and the gas plug 24 and is fixed to the rear wall or the like via the fixing fitting 5, thereby It is possible to prevent a load due to the weight of the gas meter M from being applied to the attachment position of the gas stopper 24 and to prevent deformation due to aging.

  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 inlet opening 27 is formed in the inlet rear-side bent portion 212. However, the inlet opening 27 may be omitted, and the ball bearing 261 is expanded to insert a ball valve. Alternatively, the gas stopper 24 may be assembled by inserting the ball valve 241 from one end of the inlet piping unit main body 21. When the gas supply side pipe P1 and the gas demand side pipe P2 extend in the Y direction, the inlet rear bent portion 212 and the outlet rear bent portion 312 are omitted, and the inlet straight portion 211 and the outlet straight portion. If the entrance first joint 22 and the exit first joint 32 are provided on the rear side in the Y direction of 311, the same effects as in the above embodiment can be obtained.

  In the above embodiment, the inlet straight portion 211 is formed with an enlarged inner diameter at the attachment position of the gas plug 24. However, the inner diameter of the inlet straight portion 211 must be reduced from the front side toward the rear side. The inner diameter of the attachment position of the gas stopper 24 may be substantially the same as the inner diameter of the front side, or the inner diameter may gradually increase from the front side toward the rear side. If the inlet straight portion 211 is formed to have an inner diameter that is substantially the same or gradually increases from the front side to the rear side, the structure is simplified and manufacture is facilitated.

  Moreover, in the said embodiment, although the gas piping unit 1 which can respond to two types of sizes 15A and 20A as an example was illustrated, the internal diameter of the gas piping unit 1 was expanded or reduced, and piping of other sizes (for example, 8A, 10A, 25A, 32A) may be set to be connectable, or may be set to be compatible with pipes of three or more different sizes.

  In the embodiment, the gas plug 24 and the pressure detection plug 25 are provided in the inlet pipe unit main body 21. However, the gas plug is provided in at least one of the inlet pipe unit main body 21 and the outlet pipe unit main body 31. The pressure detecting plug 25 is not an essential component of the present invention and may be omitted.

  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 4 Fixing member 7 Lid material M Gas meter P1 Gas supply side piping P2 Gas demand side piping 21 Inlet piping unit main body (piping unit main body)
22 Inlet first joint (first joint)
22a Normal joint 22b Large flow joint 23 Inlet second joint (second joint)
24 Gas stopper 218 Joint receiving part 27 Entrance opening (opening)
31 Outlet piping unit body (Piping unit body)
32 Outlet first joint (first joint)
33 Outlet second joint (second joint)
35 Exit opening (opening)
211 Entrance straight section (straight section)
212 Entrance rear side bent part (rear side bent part)
214 Front bent part (front bent part)
311 Exit straight section (straight section)
312 Exit rear bend (rear bend)
314 Exit front bend (front bend)

Claims (3)

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 piping unit and the outlet piping unit are respectively an overall tubular piping unit main body, a first joint that connects one end of the piping unit main body to the supply side piping or the demand side piping, and the piping unit. A second joint that connects the other end of the main body to the inlet or outlet of the gas meter, and
The 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 the front side is continuous with the front side of the linear portion and bends the other side end downward. A bent portion and a rear bent portion that is continuous with the rear side of the linear portion and bends the one side end portion downward.
At least one of the inlet piping unit and the outlet piping unit is provided with a gas stopper at the straight portion,
The straight portion is formed such that the rear inner diameter including the attachment position of the gas stopper is larger than the inner diameter of the front side of the attachment position,
The one end of the pipe unit main body can be attached by inserting the first joint inside, and a joint receiving portion having an enlarged inner diameter is formed.
The gas piping unit, wherein the rear bent portion is provided with an opening that opens toward the rear side and a lid member that closes the opening.   The gas piping unit according to claim 1, wherein a fixing member for fixing the gas piping unit to a rear structure is attached to the front side of the attachment position of the linear portion.   The first joint is configured such that either a normal joint for a normal flow rate or a large flow rate joint for a large flow rate larger than the normal joint can be selected and attached to the piping unit body. The gas piping unit according to claim 1 or 2, wherein

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