JP2015121313A - Gas leakage suppression adapter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a one-way valve to be easily closed and sufficiently suppress gas leakage in a case where the gas leakage possibly occurs due to damage or the like of a gas supply device.SOLUTION: A gas leakage suppression adapter includes, in a gas supply pipe 1, one-way valve 4 opening or closing a flow of gas and an urging member urging a valve member 41 of the one-way valve 4 from a supply target side to a supply source side so as to make the one-way valve 4 in an open state. The urging member 5 includes an elastic section extending in a direction of a gas channel 12 of the gas supply pipe 1, and having a cross-sectional area smaller than a cross-sectional area of the gas channel 12; a support section formed on a supply target-side end of the elastic section, and fixedly supported by the supply target side of the one-way valve 4 in the gas channel 12; and an elastic contact section formed on a supply source-side end of the elastic section, and elastically contacting the supply target side of the valve member 41. A thin wall section 11d having a small sidewall thickness is formed in a sidewall 11 of the gas supply pipe 1 at a position between the support section and the elastic contact section of the urging member 5.

Description

  The present invention relates to a gas leakage suppression adapter, and supplies gas such as liquefied petroleum gas stored in a gas container such as an LP gas cylinder to a gas supply target so as not to leak. It is about the adapter.

  The gas such as liquefied petroleum gas is stored in a gas supply source such as a gas container (for example, an LP gas cylinder; hereinafter, abbreviated as appropriate), and the supply source (gas outlet side, etc.) and gas Various gas supply equipment (gas piping, pressure regulator, etc.) is installed between the supply target (for example, gas consumption equipment such as an indoor gas stove; hereinafter, abbreviated supply as appropriate), and the gas leakage is suppressed It is used by appropriately supplying gas to the supply target.

  In the gas supply device, there is a risk that an unintended impact may be applied due to an earthquake or a fall of a snow mass, and if the impact is large, the gas supply device may be damaged and cause gas leakage. As a technique for suppressing such gas leakage, a technique of applying a valve mechanism provided with a valve or the like for suppressing gas leakage is known.

  For example, as in Patent Document 1, a valve mechanism provided between a supply source and a supply target (such as a pressure regulator), and gas flow from the supply source side to the supply target side of the gas flow path of the valve mechanism A one-way valve that opens and closes (for example, a one-way valve comprising a ball valve and a valve seat) and an extrusion that extends in the gas flow path direction and presses the one-way valve from the supply target side to the supply source side to open the valve The structure provided with the stick | rod is mentioned.

  In this valve mechanism, a fin that protrudes radially and is fitted into the gas flow path while securing the gas flow path is provided at one end side or the center of the push rod, and the fin and the inner wall of the gas flow path are provided. The extruding rod can be fixed by friction or the like. Further, the other end side of the push rod is configured to contact the one-way valve so as to be separated from the valve seat, thereby maintaining the open state of the one-way valve. When the gap between the one-way valve of the valve mechanism and the push rod is broken (for example, when the flow path is divided into two with respect to the flow path direction), the push rod swings and the one-way valve In this state, the one-way valve can be closed.

Japanese Patent Laid-Open No. 2002-340208

  However, in the valve mechanism in which the one-way valve is opened by the simple push rod as described above, even if the valve mechanism breaks, the push rod is caught in the flow path, etc. The one-way valve is unlikely to be closed, and there is a possibility that gas leakage cannot be suppressed.

  The present invention has been made based on the above-described problems, and in the case where gas leakage may occur due to breakage of the gas supply device, the one-way valve is easily closed, and gas leakage is prevented. An object of the present invention is to provide a gas leakage suppression adapter that can be suppressed.

  The gas leakage suppression adapter according to the present invention is a creation that can solve the above-mentioned problems, and a specific aspect thereof includes a gas supply source, a gas supply target, and a linear gas flow path formed by a cylindrical side wall. A gas supply pipe positioned between the gas flow path, a valve member movable in the direction of the gas flow path in the gas flow path, and a valve seat positioned on the gas supply target side of the valve member. A one-way valve that opens and closes gas flow in the gas flow path, and is positioned closer to the gas supply target side than the one-way valve in the gas flow path, and biases the valve member from the gas supply target side to the gas supply source side. An urging member that opens the one-way valve, and the urging member extends in the gas flow path direction and has a cross-sectional area smaller than the cross-sectional area of the gas flow path, It is formed at the end of the elastic part on the gas supply target side and in the gas flow path. A support portion supported on the gas supply target side of the one-way valve, and an elastic contact portion that is formed at an end portion of the elastic portion on the gas supply source side and elastically contacts the gas supply target side of the valve member, In the side wall, a thin wall portion having a thin side wall thickness is formed at a position between the support portion and the elastic contact portion of the biasing member.

  The gas flow path may be provided with a check valve that is located closer to the gas supply target side than the urging member and is closed by gas flow from the gas supply target side to the gas supply source side. . Furthermore, the thin wall portion may have a cutout portion formed on the outer peripheral surface of the gas supply pipe.

  According to the gas leakage suppression adapter according to the present invention, when a gas leakage can occur due to breakage of a gas supply device, the one-way valve can be easily closed and the gas leakage can be suppressed.

1 is a schematic explanatory view (longitudinal sectional view) of a gas leakage suppression adapter 10 showing an example of the present embodiment. The side view of the gas leak suppression adapter 10. FIG. The perspective view of the gas leak suppression adapter 10. FIG. Schematic explanatory drawing which shows the example of application of the gas leak suppression adapter 10. FIG. The fragmentary sectional view explaining the gas leak suppression adapter 10 of FIG. The schematic explanatory drawing of the air permeable member 43. FIG. Schematic explanatory drawing of the urging member 5 ((A) is a side view, (B) is a BB diagram, (C) is a CC diagram). Schematic explanatory drawing (longitudinal sectional view) showing an example of breakage of the gas leakage suppression adapter 10. Schematic explanatory drawing (longitudinal sectional view) of a gas leakage suppression adapter 100 showing another example of the present embodiment. Schematic explanatory drawing which shows the example of application of the gas leak suppression adapter 100. FIG. Schematic for demonstrating the operation example of the automatic switching regulator 90. FIG. Schematic for demonstrating the verification result of the gas leak suppression adapters 10 and 100. FIG.

  A gas leakage suppression adapter (hereinafter simply referred to as an adapter) according to an embodiment of the present invention is different from a valve mechanism that opens a one-way valve with a simple push rod, and has a linear shape with a cylindrical side wall. A gas supply pipe having a gas flow path is provided, and the one-way valve member provided in the gas flow path is biased closer to the supply target than the one-way valve in the gas flow path. The one-way valve can be opened by energizing from the supply target side to the supply source side by the member. Further, the side wall of the gas supply pipe has a thin wall portion with a thin side wall at a position between the support portion of the urging member and the elastic contact portion. When an unintended impact is applied to a supply device (pressure regulator, high-pressure hose, etc.) due to an earthquake or a falling snow block, it is connected to the periphery of the thin wall of the side wall (for example, both ends of the gas supply pipe) Compared with various gas supply devices) and the like, the thin wall portion is easily broken.

  That is, in the adapter according to the present embodiment, when an unintended impact is applied to the adapter or the gas supply device as described above and the thin wall portion breaks, the urging member separates from the one-way valve to the supply target side. Thus, the valve member cannot be urged, and the one-way valve is closed to suppress gas leakage.

  Here, when compared with a valve mechanism having a structure such as that of Patent Document 1, for example, when the valve mechanism is broken, as described above, the push rod is caught in the flow path and the like. It is also conceivable that the directional valve is not separated. Also, when the valve mechanism breaks incompletely, for example, when the flow path of the valve mechanism is not divided and the valve mechanism is cracked and gas leakage can occur, the push rod It is also conceivable that there is almost no movement as long as it is inclined in the flow path.

  On the other hand, according to the adapter of the present embodiment, the biasing member does not have the fin as described above and has a relatively simple structure (simple structure compared to the push-out rod). The urging member separates from the one-way valve toward the supply target without being caught in the gas flow path, so that the one-way valve is likely to be closed and gas leakage can be suppressed. Further, even if the urging member is broken incompletely as described above, the urging member is bent and the urging force against the valve member is lowered, so that the one-way valve is likely to be closed as in the case of complete breakage. Gas leakage can be suppressed.

  As described above, the adapter according to the present embodiment only needs to be provided with a one-way valve or a biasing member in the gas flow path by the side wall having the thin wall portion. For example, the adapter is generally used in various fields such as the gas supply equipment field. For example, the following specific examples can be given as appropriate.

[Example 1]
<Configuration Example of Adapter of Example 1>
An adapter 10 shown in FIGS. 1 to 5 shows an example of the present embodiment, and is applied to a gas supply facility using a gas container (LP gas cylinder or the like) 2 as a supply source, for example, as shown in FIG. The present invention is applicable between the gas container 2 and a gas supply device (for example, the pressure regulator 3 in FIG. 4) located on the supply target side having a lower pressure than the gas container 2. First of all, the adapter 10 is mainly composed of a gas supply pipe 1 having a linear gas flow path 12 formed by a cylindrical side wall 11 and a supply source of the gas flow path 12 (in this embodiment, a gas container 2). ) Side and a one-way valve 4 for opening and closing gas flow from the side to the supply target side (for example, the gas flow port 31 side in FIG. 5), and the gas flow path 12 is located closer to the supply target side than the one-way valve 4. And an urging member 5 extending in the direction of the gas flow path 12 (that is, the axial direction of the side wall 11).

  The adapter 10 configured in this way includes, for example, a gas outlet 21 of a cylindrical connecting portion 25 that protrudes from the upper cock 20 of the gas container 2 and a supply source of a pressure regulator (single stage regulator, etc.) 3. Between the adapter 10 and the gas outlet 21 and the pressure regulator 3 by appropriately applying a fixture or the like between the adapter 10 and the gas outlet 31 and the pressure regulator 3. And a structure that suppresses gas leakage (for example, a connection fixing structure using an inlet screw, a sleeve, or the like described later).

  Here, paying attention to the conventional gas leakage suppression device incorporated in the gas supply device such as the pressure regulator 3, when the conventional gas leakage suppression device is damaged, the gas supply device itself is replaced. This will incur costs such as replacement costs. In addition, the gas supply device may not be exchanged until the expiration date of the certification has passed.

  On the other hand, according to the adapter structure such as the adapter 10, even if it is damaged, it is only necessary to replace the normal adapter 10, the replacement work is relatively easy, and it can contribute to various cost reductions, and the certification is completed. There is no need to consider the period.

<Example of gas supply pipe 1>
The gas supply pipe 1 can be formed by processing materials applied to various pipes for gas supply equipment (so-called inlet pipes), for example, and includes a gas outlet 21, a gas distribution port 31, and the like. A linear gas flow path 12 is formed, which extends through the inside of the side wall 11 in the axial direction of the side wall 11, and is provided on the supply source side of the side wall 11. By connecting the end 11a side to the gas outlet 21 and connecting the supply target side end 11b side to the gas circulation port 31, the gas in the gas container 2 passes through the gas flow path 12 to the gas outlet 21. The form comprised so that gas may be distribute | circulated from the side to the gas distribution port 31 side is applicable. In the gas flow path 12 of the first embodiment, the shape is narrowed stepwise as it approaches the supply target side from the supply source side, and step surfaces (step surfaces 12a and 12b described later and A valve seat 42) is formed.

  In the central part 11c of the side wall 11, a thin wall part 11d having a small side wall thickness is formed at a position between a support part 52 and an elastic contact part 53 of the urging member 5 described later. The thin wall portion 11d can be configured by forming, for example, a groove-shaped notch portion 11e extending along the circumferential direction of the outer peripheral surface on the outer peripheral surface of the central portion 11c of the side wall 11. For example, the cutout portion 11e may have a cross-sectional shape of the inner wall surface in the cutout portion 11e formed in various shapes such as a V shape, a U shape, and a U shape. Further, the cutout portion 11e may be a shape that constitutes the thin wall portion 11d as described above and is easily broken by a large unintended impact or the like. For example, the cutout portion 11e is continuous along the circumferential direction of the outer peripheral surface of the central portion 11c. The shape is not limited to the above, and may be a shape extending intermittently.

  The supply source side end 11 a side of the side wall 11 and the gas outlet 21 can be connected by using an inlet fastening screw 6 that can be attached to the central portion 12 c of the side wall 11. The inlet fastening screw 6 includes a cylindrical portion 61 having a shape that allows the central portion 11c of the side wall 11 to be inserted therethrough, and is relative to the side wall 11 with the central axes of the side wall 11 and the cylindrical portion 61 as rotation axes. It is attached to the central portion 11c of the side wall 11 so as to be rotatable. A male screw portion 6a is formed on the outer peripheral surface of the inlet fastening screw 6 on the supply source side end portion 11a side. For example, the supply source side end portion 11a side of the side wall 11 is placed in the gas outlet 21 as shown in FIG. In the inserted state, it can be screwed with the female screw part 23 formed on the inner wall surface 22 in the gas outlet 21 (rotating and screwing with the central axes of the side wall 11 and the cylindrical part 61 as rotation axes). It is configured as follows. Further, on the supply target side end portion 11b side of the inlet fastening screw 6, in order to facilitate the rotation of the inlet fastening screw 6 while applying a tool or the like as necessary, the shape of the multi-face structure as shown in FIG. (For example, a hexagonal nut shape) may be formed.

  On the side of the supply source side end 11 a of the side wall 11, a diameter-enlarged portion 13 having a shape protruding in a flange shape in the outer peripheral side direction of the side wall 11 and capable of being inserted into the gas outlet 21 is formed. Thus, as described above, the gas supply pipe 1 can be prevented from coming out to the pressure regulator 3 side in a state where the inlet fastening screw 6 and the female screw portion 23 in the gas outlet 21 are screwed together. In addition, a tapered surface 14 that is inclined so as to be close to the axial center side of the side wall 11 with respect to the direction of the supply source side end 11a of the side wall 11 from the enlarged diameter portion 13 is formed, and the supply side end 11a of the side wall 11 is formed. When the side is tapered, the supply source side end 11a side can be easily inserted into the gas outlet 21. Further, a seal member is interposed on an engagement surface (not shown) between the supply source side end portion 11 a of the side wall 11 and the inner wall surface 22 in the gas outlet 21, so that the space between the cylindrical connection portion 25 and the side wall 11 is interposed. It becomes possible to improve the sealing property, adhesiveness, and the like. For example, when the taper surface 14 is an engagement surface, a seal member 15 such as an O-ring is attached to the taper surface 14 as shown in FIG.

  The supply target side end 11b side of the side wall 11 and the gas circulation port 31 can be connected using a cylindrical sleeve 7 or an inlet fastening screw 8 (for example, having the same shape as the inlet fastening screw 6). In the sleeve 7, a cylindrical portion 71 having a shape in which the supply target side end portion 11 b side of the side wall 11 and the cylindrical connection portion 30 of the pressure regulator 3 can be respectively inserted from both ends of the sleeve 7 is formed. . A female screw portion 7a is formed on the gas supply pipe 1 side in the cylindrical portion 71, and is configured to be able to be screwed with a male screw portion 11f formed on the outer peripheral surface of the supply target side end portion 11b of the side wall 11. ing.

  The inlet fastening screw 8 can be of the same shape as the above-described inlet fastening screw 6. For example, the inlet fastening screw 8 has a cylindrical portion 81 having a shape through which the central portion 3 a of the cylindrical connecting portion 30 of the pressure regulator 3 can be inserted. And it is attached to the center part 3a of the said cylindrical connection part 30 so that it can rotate relatively with the cylindrical connection part 30. As shown in FIG. A male screw portion 8a is formed on the outer peripheral surface of the inlet fastening screw 8 on the gas flow port 31 side, and the gas flow port 31 side of the cylindrical connection portion 30 is fitted into the sleeve 7 as shown in FIG. In this state, it is screwed with the female screw portion 7b formed on the pressure regulator 3 side in the cylindrical portion 71 of the sleeve 7 (rotates about the central axes of the cylindrical connecting portion 30 and the cylindrical portion 71 as the rotation axes). And can be screwed together). Further, on the pressure regulator 3 side of the inlet fastening screw 8, as in the case of the inlet fastening screw 6, it may be formed in a multifaceted shape (for example, a hexagonal nut shape) as shown in FIG.

  On the gas flow port 31 side of the cylindrical connection part 30, the enlarged diameter part 32 is formed in the same manner as the supply source side end part 11 a side of the side wall 11 described above, and the inlet fastening is performed by the enlarged diameter part 32 as described above. It is possible to prevent the cylindrical connecting portion 30 from coming off to the pressure regulator 3 side in a state where the screw 8 and the female screw portion 7b in the cylindrical portion 71 are screwed together. Moreover, the gas flow port 31 side of the cylindrical connection part 30 forms the taper surface 33 so that it may become a taper shape, makes it easy to insert in the cylindrical part 71, or the engagement surface with the inside of the cylindrical part 71 A sealing member is interposed between the sleeve 7 and the sealing member 34 (for example, an O-ring or the like is attached to the tapered surface 33 as shown in FIG. 5) to improve the sealing performance and adhesion between the sleeve 7 and the cylindrical connecting portion 30. You may do it.

  In addition, it is preferable that the inlet fastening screw 6 and the sleeve 7 are applied so as not to cover the thin wall portion 11d of the side wall 11 so as not to prevent the thin wall portion 11d from being easily broken.

<Example of one-way valve 4>
The one-way valve 4 includes a valve member 41 that is movable in the direction of the gas flow path 12 in the gas flow path 12 and a valve seat 42 that is positioned on the supply target side of the valve member 41. The form comprised so that gas distribution | circulation from the supply source side to the supply object side of the gas flow path 12 can be opened and closed by the movement of 41 can be applied.

  The valve member 41 has a spherical shape (or a plug shape or the like) as shown in FIGS. 1 and 5, for example, and can be loaded on the supply source side end portion 11a side of the gas flow path 12. Movable toward and away from the valve seat 42 formed of an annular step surface projecting toward the axial center of the side wall 11 from the position closer to the supply side than the valve member 41 on the supply source side end portion 11a side, A mode in which the one-way valve 4 is opened and closed by movement is applied. The gas passage 12 is loaded as described above by loading the gas passage 12 with a gas-permeable member 43 having a shape that does not interfere with the gas flow in the gas passage 12 on the supply source side of the valve member 41 in the gas passage 12. It can suppress that the made valve member 41 is discharged | emitted from the supply source side of the gas flow path 12. FIG.

  As the air-permeable member 43, for example, as shown in FIG. 1 and FIG. 6, a disk-shaped portion 43b in which a plurality of air-holes 43a are formed, and a plurality of the air-permeable members 43 formed to protrude in the radial direction of the disk-shaped portion 43b. Of the inner wall surface 11g of the side wall 11 on the supply source side end 11a side, and protrudes from the position closer to the supply source side than the valve member 41 toward the axial center side of the side wall 11. What can be installed (engaged and installed so that the engaging portion 43c and the stepped surface 12a abut) is applied to the annular stepped surface 12a.

<Example of urging member 5>
The biasing member 5 is located on the supply target side of the one-way valve 4 in the gas flow path 12 so that the valve member 41 can be biased from the supply target side to the supply source side to open the one-way valve 4. The form configured in can be applied. For example, as shown in FIGS. 1, 5, 7, etc., an elastic part 51 extending in the direction of the gas flow path 12 and having a cross-sectional area smaller than the cross-sectional area of the gas flow path 12, A support portion 52 formed at a side end portion and fixedly supported on the supply target side of the one-way valve 4 in the gas flow path 12 and a supply target of the valve member 41 formed at a supply source side end portion of the elastic portion 51 And a resilient contact portion 53 that is resiliently contacted to the side, and is loaded from the supply source side of the gas flow path 12 and disposed at a predetermined position.

  In the case of such an urging member 5, for example, by using a metal material having a long line shape and a cross-sectional area smaller than the cross-sectional area of the gas flow path 12, the elastic part 51, the support part 52, and the elastic contact part 53 are used. Can be formed as one body. As a specific example, the linear elastic part 51 can be formed by processing the metal material so as to extend along the direction of the gas flow path 12 on the central part side. According to such an elastic part 51, it becomes easy to position so that gas distribution may not be disturbed to gas passage 12. Further, since the elastic portion 51 extends linearly with respect to the direction of the gas flow path 12, a posture in which the elastic portion 51 is stretched so as to maintain a distance between the support portion 52 and the elastic contact portion 53 (hereinafter, a stretched posture). The valve member 41 is urged toward the supply source via the elastic contact portion 53, and the one-way valve 4 is easily opened. For example, as shown in FIG. 1 and the like, the above-described tension posture is easily held by being disposed along the inner wall surface 11g.

  On one end side (supply target side) of the metal material, a winding process is performed with a predetermined number of turns around the axis of the gas flow path 12 (for example, a state of being wound along the cross section of the gas flow path 12) Thus, the coil-shaped support portion 52 can be formed. The support portion 52 can be fixedly supported on an annular step surface 12b that protrudes toward the axial center of the side wall 11 from a position closer to the supply target side than the thin wall portion 11d on the supply target side end portion 11b side of the side wall 11, for example. With such a support structure, the support portion 52 extends in a coil shape along the annular direction of the step surface 12b, and is positioned so as not to interfere with the gas flow with respect to the gas flow path 12 (the gas flow along the coil axis side). Position). Further, when the support portion 52 is formed by being wound in a coil shape having a diameter larger than the inner wall surface 11g at the position of the step surface 12b, the urging member 5 is rotated in a screw shape with respect to the gas flow path 12. Thus, it is loaded while being twisted, and is tightly fitted to the stepped surface 12b, so that it can be more stably fixed and supported.

  On the other end side (supply source side) of the metal material, winding processing is performed with a predetermined number of turns (for example, along the longitudinal section of the gas flow path 12) with a straight line perpendicular to the axis of the gas flow path 12 as the central axis. The coiled elastic contact portion 53 can be formed by processing so as to be in a rotated state. The elastic contact portion 53 only needs to be formed so as to be wound in a coil shape that can penetrate the axial center side of the valve seat 42 so as to bias the valve member 41 toward the supply source side. By appropriately setting the number of coil turns and the like so as not to be present, it is easy to position the gas passage 12 so as not to hinder gas flow. Further, since the elastic contact portion 53 urges the valve member 41 toward the supply source while making elastic contact, the impact on the valve member 41 due to the urging can be reduced.

  According to the urging member 5 as described above, for example, compared with an extrusion rod having a complicated structure such as the valve mechanism described above, it has a simple structure and is easy to manufacture, thus reducing the product cost. It is also possible to contribute. Further, the urging force by the urging member 5 can be adjusted as appropriate. For example, when a long linear metal material as described above is applied, the urging force can be adjusted by appropriately setting the type and diameter of the metal material. For example, when the urging force of the urging member 5 is set according to the gas flow rate from the gas container 2, the one-way valve 4 can be closed when a predetermined gas flow rate is exceeded. The one-way valve 4 can also function as a gas excessive outflow suppression valve.

<Example of breakage of adapter 10>
For example, as shown in FIG. 4 and the like, an adapter 10 is applied between the gas container 2 and a gas supply device (for example, the pressure regulator 3 in FIG. 4) located on the supply target side at a lower pressure than the gas container 2. When an unintended impact is applied to the adapter 10 or a gas supply device around the adapter 10, the stress due to the impact tends to concentrate on the thin wall portion 11d. As a result, when the stress due to the impact exceeds a predetermined magnitude, the adapter 10 is intentionally moved to the thin wall portion 11d before the portion other than the thin wall portion 11d of the adapter 10 is damaged. It can be broken.

  When the adapter 10 breaks at the thin wall portion 11d, for example, as shown in FIG. 8, the gas supply pipe 1 is separated into two at the thin wall portion 11d as a boundary, and the urging member 5 is separated from the one-way valve 4. Thus, since the one-way valve 4 is closed, even if the supply source side (gas container 2 side) of the adapter 10 is in a higher pressure state than the supply target side of the adapter 10, It becomes possible to suppress gas leakage.

  Further, for example, even when the above-described breakage is incomplete and the gas supply pipe 1 is not sufficiently separated, the elastic portion 51 of the biasing member 5 is easily bent, so that the protruding posture of the elastic portion 51 is deformed, and the valve The biasing force that biases the member 41 is suppressed. That is, since the one-way valve 4 is likely to be in a closed state, it is possible to suppress gas leakage from the gas container 2 as in the case shown in FIG.

[Example 2]
<Configuration Example of Adapter of Example 2>
An adapter 100 (adapter 100a, 100b in FIG. 10; hereinafter, abbreviated as adapter 100 in FIG. 10) shown in FIGS. 9 to 11 shows another example of the present embodiment, and is simply a gas as shown in Example 1. The present invention can be applied not only to a gas supply facility using the container 2 as a supply source but also to a gas supply facility having a plurality of supply sources. Hereinafter, the same reference numerals are given to the same components as those in the first embodiment, and the detailed description thereof is omitted as appropriate.

  The adapter 100 has the same configuration as that of the adapter 10, and, for example, as shown in FIG. 10, the gas containers 2 and 2a are connected to various gas supply devices (automatic switching regulator 90, high-pressure hoses 9a and 9b, etc.). Gas supply equipment connected via a gas container 2, 2a, and gas supply devices (for example, high pressure hoses 9a, 9b in FIG. 10 respectively) located on the supply target side having a lower pressure than the gas containers 2, 2a, Each applied during.

  First, the adapter 100 will be schematically described. As shown in FIG. 9, the gas supply pipe 1 having a straight gas flow path 12 formed by a cylindrical side wall 11 and the supply source side of the gas flow path 12 (adapter) The gas flow from the gas container 2 side in the case of 100a and the gas container 2a side in the case of the adapter 100b to the supply target side outside the figure (for example, the supply target side through the high-pressure hoses 9a and 9b in FIG. 10) is opened and closed. The one-way valve 4 and the biasing member 5 that is positioned on the supply target side of the gas flow path 12 relative to the one-way valve 4 and extends in the direction of the gas flow path 12 (that is, the axial direction of the side wall 11). I have.

  Further, at the position closer to the supply target side than the biasing member 5 in the gas flow path 12, from the supply target side to the supply source side (in the case of the adapter 100a, the gas container 2 side, in the case of the adapter 100b, the gas container 2a side). There is provided a check valve 40 that is closed by gas flow. As the check valve 40, various forms can be applied as long as the check valve 40 is closed by the gas flow from the supply target side to the supply source side as described above. As an example, as shown in FIG. 9, the gas passage 12 has a valve member 44 movable in the direction of the gas passage 12 and a valve seat 45 located on the supply source side of the valve member 44. And the form comprised so that the gas distribution from the supply object side of the gas flow path 12 to the supply source side can be opened and closed by the movement of the valve member 44 is mentioned.

  As the valve member 44 and the valve seat 45, those similar to the valve member 41 and the valve seat 42 of the one-way valve 4 can be applied, respectively. For example, in the case of the valve member 44, a spherical shape (or plug shape or the like) as shown in FIG. 9 can be loaded on the supply target side end 11b side of the gas flow path 12, and the supply target of the inner wall surface 11g of the side wall 11 The side end 11b is movable so as to come in contact with and separate from the valve seat 45 formed of an annular stepped surface projecting toward the axial center of the side wall 11 from a position closer to the supply source than the valve member 44. The form which opens and closes the check valve 40 is mentioned. In addition, in the valve seats 42 and 45 of FIG. 9, it forms with the taper-shaped level | step difference surface.

  On the supply target side of the valve member 44 in the gas flow path 12, a stopper 46 that suppresses the valve member 44 loaded in the gas flow path 12 from being discharged from the supply target side of the gas flow path 12 is provided. The stopper 46 only needs to have a shape that can suppress the discharge of the valve member 44 without disturbing the gas flow in the gas flow path 12. For example, the stopper 46 has the same shape as the air-permeable member 43 described above, or a biasing member. Application of the same shape as that of the support portion 52 in FIG.

  For example, as shown in FIG. 10, the adapter 100 configured in this manner includes a gas outlet 21 of each upper cock 20 of the gas container 2, 2 a and one end of each of the high pressure hoses 9 a, 9 b on the supply source side. 9aa and 9ba, respectively. The other end portions 9ab and 9bb of the high pressure hoses 9a and 9b are connected to the primary pressure adjusting unit 90a side of the automatic switching adjuster 90, respectively. Between the secondary pressure adjusting unit 90b of the automatic switching adjuster 90 and the supply source side, for example, as shown in FIG. 10, screw gas plug 91a with inspection hole, drain unit 91b, supply pipe 91c, gas meter 91d, supply It is possible to provide various gas supply devices such as a pipe 91e.

  In addition, in the connection and fixing structure of the gas outlet 21, the adapter 100, the high pressure hoses 9a and 9b, the automatic switching adjuster 90, and various gas supply devices of the second embodiment, a fixing tool or the like is used as in the first embodiment. A structure that suppresses gas leakage can be mentioned by applying as appropriate.

<Example of automatic switching adjuster 90>
In the automatic switching adjuster 90, as described above, a plurality of supply sources are connected via various gas supply devices such as the adapter 100 and the high-pressure hoses 9a and 9b, and each supply can be performed without interrupting the gas supply to the supply target. It is possible to apply a general form that makes any of the sources interchangeable. For example, as shown in FIG. 11, on-off valves 93a and 93b are respectively provided between the flow paths 92a and 92b of the primary pressure adjusting unit 90a into which the gas from the gas containers 2 and 2a flows and the secondary pressure adjusting unit 90b. When the elastic contact body 95 provided in the secondary pressure adjusting unit 90c contacts and separates from the on-off valves 93a and 93b (in FIG. 11, contacts and separates from the valve rods 94a and 94b), There is a mode in which the on-off valves 93a and 93b are opened and closed so that gas flows as indicated by white arrows in the figure.

  In the elastic contact body 95 of FIG. 11, the elastic contact portions 95a and 95b facing the on-off valves 93a and 93b are formed in a stepped shape (in FIG. 11, the elastic contact portion 95a is formed so as to protrude from the elastic contact portion 95b. And the posture of the elastic body so that the distance between the on-off valves 93a and 93b changes according to the gas pressure Pβ of the secondary pressure adjusting unit 90c (corresponding to the gas pressure on the supply target side). Is elastically supported via the elastic portion 95c so that the position of the elastic contact portions 95a and 95b can be changed by the switching lever 90c.

  Examples of the operation of the automatic switching adjuster 90 include the following examples. For example, in FIG. 11A, the gas pressures Pα and Pγ of the flow paths 92a and 92 of the primary pressure adjusting unit 90a are substantially set with the gas container 2a as an auxiliary container (preliminary container) and the gas container 2 as a use-side container. In the case where they are the same and are respectively larger than the gas pressure Pβ (for example, when the gas is stored in the gas containers 2 and 2a substantially equally), the elastic contact portion 95a is an open / close valve in the posture of the elastic contact body 95. It is in a posture in which the elastic contact portion 95b is elastically contacted with 93a and separated from the on-off valve 93b, and only the gas in the gas container 2 is allowed to flow to the supply target side.

  From this state, when the gas in the gas container 2 is consumed and the gas pressure Pα decreases and the gas pressure Pγ also decreases, the elastic contact body 95 approaches the on-off valves 93a and 93b (elastic contact) as shown in FIG. The portion 95b is elastically contacted with the on-off valve 93b), and the on-off valve 93b starts to open, so that the gas from the gas container 2a starts to flow in an auxiliary manner to the supply target side.

  Next, when the posture of the elastic contact body 95 is changed by operating the switching lever 90c to change the positions of the elastic contact portions 95a and 95b, the open / close valve 93a is closed and the open / close valve 93b is closed as shown in FIG. It will be in an open state and only gas of gas container 2a will distribute gas to the supply object side. Thereby, the gas container 2 that has consumed the gas can be replaced (replaced with the gas container 2 storing the gas) without interrupting the gas supply to the supply target. In FIG. 11D, the gas container 2a becomes the use side container, and the gas container 2 functions as an auxiliary container (preliminary container).

  Note that the gas container that has consumed gas as described above is replaced while the switching lever 90c is erroneously operated. For example, the gas container 2 is replaced in the state shown in FIG. 11B in the gas supply facility of FIG. When the one-way valve 4 of the adapter 100b is not closed and does not function as a gas excessive outflow suppression valve (the operation of separating the gas container 2 and the adapter 100a with the facility of FIG. 10) Even if the gas in the container 2a can be circulated to the adapter 100a via the automatic switching regulator 90 or the like, the check valve 40 functions as long as the adapter 100a and the high-pressure hose 9a are connected. This makes it possible to suppress gas leakage from the gas container 2a.

<Example of breakage of adapter 100>
The adapter 100 is applied to a gas supply facility having a plurality of gas supply sources. For example, as shown in FIG. 10 and the like, the gas containers 2 and 2a are connected to various gas supply devices (automatic switching regulator 90, high-pressure hose 9a, 9b etc.), when an unintended impact is applied to the adapter 100 and the gas supply equipment around the adapter 100, the impact is applied as in the first embodiment. The stress due to is easily concentrated on the thin wall portion 11d. As a result, when the stress due to the impact exceeds a predetermined magnitude, the adapter 100 is intentionally deposed by the thin wall portion 11d before a portion other than the thin wall portion 11d of the adapter 100 is damaged, for example. It can be broken.

  For example, when the adapters 100a and 100b are broken at the thin wall portion 11d, the gas supply pipe 1 is separated into two parts (for example, the adapter 100a is separated as indicated by a dotted line portion in FIG. 10) with the thin wall portion 11d as a boundary. Since the urging member 5 is separated from the one-way valve 4 and thereby the one-way valve 4 is closed, even if the supply source side (gas container 2, 2a side) of the adapters 100a, 100b is the adapter 100a, Even in a state of higher pressure than the supply target side of 100b, it becomes possible to suppress gas leakage of gas from the gas containers 2 and 2a. Even when the adapters 100a and 100b are not completely broken and the gas supply pipe 1 is not sufficiently separated, the elastic portion 51 of the urging member 5 is easily bent. The biasing force that biases the member 41 is suppressed. That is, since the one-way valve 4 is likely to be closed, it is possible to suppress gas leakage from the gas containers 2 and 2a as in the first embodiment.

  Further, either one of the adapters 100 is broken, for example, the adapter 100b is not broken, and only the adapter 100a is broken and separated as shown by a dotted line portion in FIG. 10, and the one-way valve 4 of the adapter 100b is not closed. A state in which the gas in the gas container 2a can flow to the adapter 100a via the automatic switching adjuster 90 or the like when it does not function as a gas excessive outflow suppression valve (for example, the state shown in FIGS. 10 and 11B) Even so, when the check valve 40 of the adapter 100a functions, gas leakage from the gas container 2a via the automatic switching adjuster 90 can be suppressed.

[Verification of adapter of this embodiment]
<Example of strength calculation related to breakage of adapters 10 and 100>
Here, assuming that a predetermined breaking load P is applied to the sleeve 7 side (that is, the pressure regulator 3 side) in the adapter 10 as shown in FIG. 12, the maximum bending moment M and the breaking of the thin wall portion 11d are assumed. By obtaining the load P, the strength of the thin wall portion 11d was verified. In this verification, the reference value of the static load that can be applied to the pressure regulator 3 connected to the sleeve 7 side is set to 50 N · m or more, and the design target strength of the thin wall portion 11 d of the adapter 10 is set to 60 to 110 N · m. It was. Further, the inner diameter d1 and the outer diameter d2 of the thin wall portion 11d were 4.2 mm and 11.2 mm, respectively, and the distance L between the thin wall portion 11d and the supply target side end portion of the sleeve 7 was 33 mm.

  First, the cross-sectional area A, the cross-sectional secondary moment I, and the cross-sectional coefficient σ of the thin wall portion 11d can be obtained as shown below.

・ Cross sectional area A = π / 4 (d2 ^ 2-d1 ^ 2) = 84.67 mm
-Sectional moment of inertia I = π / 64 (d2 ^ 4-d1 ^ 4) = 757.13
Section modulus σ = π / 32 ((d2 ^ 4-d1 ^ 4) / d2) = 135.20 mm ³
Then, the actual value of C3604 tensile strength Z, the actual value of maximum bending moment M (that is, σ * Z), and Young's modulus were determined to be 50 kg / mm ² , 66 N · m (6760 kg · mm), and 1 × 10 respectively. A result of ⁸ was obtained. Focusing on the fact that the actual value of the maximum bending moment M is 66 N · m, it can be seen that the thin wall portion 11 d of the adapter 10 is within the design target strength range. The actual value of the breaking load P (that is, M / L) was 2009 N (204.8 kg). When C3604 tensile strength Z, maximum bending moment M, and breaking load P in accordance with JIS H 3100 were determined, 34.2 kg / mm ² , 45 N · m (4624 kg · mm), and 1374 N (140.1 kg), respectively. Met.

<Example when pressure regulator 3 is connected to adapters 10 and 100>
Next, in the case where the pressure regulator 3 is connected to the adapter 10 as shown in FIG. 4, assuming the case where a predetermined breaking load P1 is applied, the breaking strength and breaking load P1 of the thin wall portion 11d are obtained. Thus, the strength of the thin wall portion 11d was verified. The length L1 of the pressure regulator 3 and the distance L2 from the end of the pressure regulator 3 to the thin wall portion 11d were 130 mm and 185 mm, respectively. The breaking strength (moment) of the inlet pipe in the pressure regulator 3 is 130 N · m (actual measurement value).

  As a result, it was confirmed that the thin wall portion 11d was broken and fractured when the load P1 was 357 N (= 66 N · m / 0.185). At this time, the moment applied to the inlet pipe in the pressure regulator 3 is 46 N · m (= 357 N * 0.13 m), and the inlet pipe in the pressure regulator 3 has 36% of the breaking strength of the inlet pipe itself ( 46/130 * 100) only. That is, it can be read that the thin wall portion 11d of the adapter 10 is first broken before the inlet pipe of the pressure regulator 3 is broken.

<Example when tension type high pressure hose is connected to adapters 10 and 100>
Next, it is assumed that a tension type high pressure hose (for example, the high pressure hoses 9a and 9b in FIG. 10) is connected in place of the pressure regulator 3 and a predetermined breaking load P2 is applied in the structure as shown in FIG. The strength of the thin wall portion 11d was verified by obtaining the breaking strength and the breaking load P2 of the thin wall portion 11d. The length of the tension type high pressure hose and the distance from the end of the tension type high pressure hose to the thin wall portion 11d are L1 (= 130 mm) and L2 (= 185 mm), respectively, as in the case of the pressure regulator 3. did. The breaking strength (moment) of the tension type high-pressure hose is 42 N · m (measured value).

  As a result, it was confirmed that the thin wall portion 11d was broken and broken when the load P2 was 611N (= 66 N · m / 0.108). At this time, the moment applied to the joint portion of the tension type high pressure hose is 15.3 N · m (= 611 N * 0.025 m), and the joint portion of the tension type high pressure hose has 36% of the breaking strength of the joint portion itself ( 15.3 / 42 × 100) was added. That is, it can be read that the thin wall portion 11d of the adapter 10 breaks first before the joint portion of the tension type high pressure hose breaks.

  Also in the strength of the thin wall portion 11d of the adapter 100, each verification (each verification applying the adapter 100 instead of the adapter 10) was performed by obtaining the breaking loads P, P1, and P2 in the same manner as in the case of the adapter 10. However, it was confirmed that the same verification result as that of the adapter 10 was obtained.

  According to each verification result shown above, for example, various gas supply devices such as a pressure regulator and a tension type high-pressure hose are connected to the adapter according to the present embodiment, and the gas supply device has an unintended impact due to an earthquake or a fall of a snow lump. In this case, the thin wall portion of the adapter of this embodiment may be broken first (for example, the adapter breaks first with a force of 36% of the single-stage regulator / high-pressure hose breaking strength). found.

  Although the present invention has been described in detail only for the specific examples described above, it is obvious to those skilled in the art that various modifications can be made within the scope of the technical idea of the present invention. It is natural that such changes and the like belong to the scope of the claims. For example, various modifications can be made based on Patent Document 1 or the like, and any effect can be obtained as long as the effects described in the present embodiment are achieved.

  In the urging member 5, when at least one of the elastic part 51, the support part 52, and the elastic contact part 53 uses a low melting point material having a lower melting point than that applied to the gas supply pipe 1 or the gas supply device. For example, when the gas supply device is exposed to a high temperature atmosphere due to the occurrence of a fire or the like, the biasing member 5 is easily melted, and the one-way valve 4 is closed by this melting, which can contribute to suppression of gas leakage. Become.

DESCRIPTION OF SYMBOLS 1 ... Gas supply pipe 10,100 ... Gas leak suppression adapter 11d ... Thin wall part 12 ... Gas flow path 3 ... Pressure regulator 4 ... One-way valve 40 ... Check valve 5 ... Energizing member 51 ... Elastic part 52 ... Support Part 53 ... Elastic contact part

Claims (3)

A gas supply pipe having a linear gas flow path with a cylindrical side wall and positioned between a gas supply source and a gas supply target;
The gas flow path has a valve member movable in the gas flow path direction and a valve seat located on the gas supply target side of the valve member, and the gas flow in the gas flow path is opened and closed by moving the valve member. A directional valve;
A biasing member that is located closer to the gas supply target than the one-way valve in the gas flow path, biases the valve member from the gas supply target side to the gas supply source side, and opens the one-way valve; With
The urging member is formed at an elastic part extending in the gas flow path direction and having a transverse area smaller than the transverse area of the gas flow path, and an end of the elastic part on the gas supply target side. A support portion that is supported on the gas supply target side of the one-way valve, and an elastic contact portion that is formed at an end of the elastic portion on the gas supply source side and elastically contacts the gas supply target side of the valve member. ,
The gas leakage suppression adapter according to claim 1, wherein a thin wall portion having a thin side wall is formed at a position between the support portion and the elastic contact portion of the biasing member.   2. A check valve that is located closer to the gas supply target side than the biasing member in the gas flow path and is closed by gas flow from the gas supply target side to the gas supply source side. The described gas leakage suppression adapter.   The gas leakage suppression adapter according to claim 1, wherein the thin wall portion has a notch formed in an outer peripheral surface of the gas supply pipe.

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