JP2006292008A - Liquefied gas feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform maintenance such as inspection, operation and replacement of equipment inside a protective cover body even if providing a safety valve of a liquefied gas feeder with a gas discharge pipe connected thereto. <P>SOLUTION: The liquefied gas feeder comprises the protective cover body 12 of box shape covering: a gas take-out valve 6 connected to the upper part of a container 1 filled with liquefied gas; a gas supply equipment unit 8 for regulating the pressure of taken-out gas to supply the gas to a use destination; and the safety valve 7 connected to the upper part of the container, and the like. The protective cover body is formed with a lower peripheral wall 13 provided fixed to the container, and at least two upper cover bodies 14, 15 mounted in an openable/closable manner to the upper end of the lower peripheral wall through hinges 16. A cutout 17 for inserting the gas discharge pipe 10 is formed in the upper face of the upper cover body 14, and the upper cover bodies 14, 15 are opened to allow inspection or the like of the inside of the protective cover body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquefied gas supply apparatus, for example, a liquefied gas supply apparatus that vaporizes liquefied gas supplied in bulk and supplies the liquefied gas to a user.

  For example, liquefied petroleum gas (hereinafter referred to as LP gas) for household use and industrial use is supplied from a cylinder-type LP gas cylinder for delivery and exchanged. There is a tendency to adopt a bulk supply method that has been conventionally applied to LP gas for industrial use. In this bulk supply system, a bulk container that stores liquefied gas in liquid is installed at the LP gas demand destination, and the bulk container is filled with LP gas liquid from a bulk truck, and the liquid LP gas in the bulk container is filled. It is a method of vaporizing and supplying to the user.

  For example, the liquefied gas supply device of the bulk supply method described in Patent Document 1 fills and stores liquefied gas in a container from a liquid intake valve provided in the trunk of a vertical or horizontal bulk container, The vaporized liquefied gas staying in the upper space in the bulk container is extracted from a gas extraction valve provided at the top or upper portion and supplied to the user. In addition, a gas supply equipment unit including a gas release preventer, a primary pressure regulator, a secondary pressure regulator, and the like is provided on the secondary side of the gas extraction valve. Furthermore, a safety valve that releases pressure when the pressure in the bulk container abnormally increases is provided at the top of the bulk container.

In addition, devices such as a gas extraction valve, a gas supply equipment unit, and a safety valve are provided in a box-shaped protective cover called a protector in order to prevent inadvertent operation. In this case, the gas discharge port on the secondary side of the safety valve is provided by being extracted from the outer shell of the protector. In order to facilitate inspection, operation or replacement of gas extraction valves, gas supply equipment units, safety valves, etc., the top of the box-shaped protector is formed with a lid that can be opened and closed, and the lid is opened to inspect internal equipment. , Can be operated or exchanged.
JP 2000-291886 A

  However, the liquefied gas supply device described in Patent Document 1 has a problem that it is not considered when used in a cold region. In other words, when used in a cold region, there is a case where a liquefied gas supply device is installed by taking measures for preventing snowfall or snowfall in order to prevent snowfall or snowfall. In this case, a gas discharge pipe may be connected to the gas discharge port of the safety valve, and the flammable liquefied gas discharged from the safety valve may be discharged into the atmosphere at a position away from the protector.

  However, for example, according to the liquefied gas supply device described in Patent Document 1, the structure is such that the gas discharge pipe is extracted from the opening provided in the cover of the protector. It may be difficult to open the inside of the protector. In such a case, there is a problem that it is difficult to inspect, operate, and replace devices such as the gas extraction valve, the gas supply equipment unit, and the safety valve inside the protector.

  It is an object of the present invention to facilitate maintenance such as inspection, operation and replacement of equipment inside a protective cover even if a gas discharge pipe is connected to a safety valve of a liquefied gas supply device.

  In order to solve the above problems, the present invention provides a container filled with a liquefied gas supplied from a liquid intake valve, a gas extraction valve connected to an upper portion of the container, and a gas extracted from the gas extraction valve. An accessory device for gas supply including a pressure regulator for adjusting the pressure of the gas, a safety valve connected to an upper portion of the container, the gas extraction valve, the accessory device, and the safety valve. In the liquefied gas supply apparatus comprising a box-shaped protective cover, the protective cover can be opened and closed via a hinge at the lower peripheral wall fixed to the container and the upper end of the lower peripheral wall The upper cover is divided into at least two attached upper covers, and a notch through which a gas discharge pipe connected to the safety valve is inserted is formed on the upper surface of one of the upper covers. .

  Because of having such a characteristic configuration, even if a gas release pipe is connected to the safety valve, the divided upper cover is placed around the hinge during maintenance such as inspection, operation, and replacement of the equipment inside the protective cover. By rotating and opening the upper cover, maintenance of the equipment inside the protective cover can be easily performed.

  In this case, the notch through which the gas discharge pipe formed on the upper surface of one upper cover is inserted extends to the open / close connection position with the other upper cover. Thereby, one upper cover can be opened without being obstructed by the gas discharge pipe. If the notch is extended to the open / close connection position with the other upper cover, the opening remains in the notch portion other than the gas discharge pipe being inserted even if the upper cover is closed. It is desirable that a closing plate for closing the opening is fixed to a gas discharge pipe or the like and provided inside one upper cover.

  In addition, one upper cover is attached to one side wall of the lower peripheral wall via a hinge, and the other upper cover is attached to the side wall of the lower peripheral wall orthogonal to one side wall via a hinge. it can. In addition, the open / close connecting portion between one upper cover and the other upper cover is formed so as to overlap with one of the upper covers on the outside, and the upper cover and the lower part stacked on the outside are overlapped. It can be set as the structure by which the locking metal fitting which locks opening and closing of this upper cover is attached to a surrounding wall.

  According to the present invention, even if a gas discharge pipe is connected to the safety valve of the liquefied gas supply device, maintenance such as inspection, operation, and replacement of equipment inside the protective cover can be easily performed.

  Hereinafter, the present invention will be described based on illustrated embodiments. 1 to 4 show a configuration of an embodiment in which the present invention is applied to a liquefied gas supply apparatus using a vertical bulk container. FIG. 1 is a front view of a liquefied gas supply apparatus according to this embodiment installed in a container, FIG. 2 is a side view of the liquefied gas supply apparatus of this embodiment, and FIG. 3 is a plan view of the liquefied gas supply apparatus of this embodiment. FIG. 4 is a perspective view of a protector which is a protective cover of the present embodiment.

  As shown in FIG. 1, the liquefied gas supply device of this embodiment includes an LP gas container 1 filled with liquefied gas, and is installed in a container box 2. However, the present invention is not limited to the case where the liquefied gas supply device is installed by taking measures for preventing snow accumulation or snowfall, and is not limited to the case where the liquefied gas supply device is installed. The LP gas container 1 is formed in a bowl-shaped cylindrical container in order to reduce the installation area. The LP gas container 1 is fixed to a foundation via a plurality of legs 3 provided at the bottom. A box-shaped protective cover 5 having an opening / closing door 4 is attached to the body of the LP gas container 1 via an attachment fitting. Although not shown, the protective cover 5 houses a liquid intake valve for connecting an LP gas hose such as a tank truck, so that LP gas is transferred to the LP gas container 1 through the liquid intake valve. It has become. Further, in the protective cover 5, as in Patent Document 1, other accessory devices such as a liquid take-out valve, a pressure equalizing valve, a liquid level gauge, etc. are provided to take out the LP gas in the LP gas container 1 from the container as needed. Is stored.

  A gas extraction valve 6 and a safety valve 7 communicating with the upper space of the LP gas container 1 are attached to a top end plate (hereinafter referred to as a celestial mirror) of the LP gas container 1. Further, a gas supply equipment unit 8 including an accessory device including a pressure regulator for adjusting the gas pressure (not shown) is connected to the secondary side of the gas extraction valve 6. The gas supply equipment unit 8 is, for example, a gas supply preventer, a primary pressure regulator, a secondary pressure regulator, and a gas that supplies gas to a user, which are sequentially connected to the gas extraction valve 6, as in Patent Document 1. A supply pipe 9 is provided. A gas discharge pipe 10 is connected to the secondary side of the safety valve 7, and the other end of the gas discharge pipe 10 passes through the wall of the container 2 and is opened to the outside air. The opening end of the gas discharge pipe 10 is covered with a cap 11 that can discharge gas and prevent rain from entering.

  These gas extraction valve 6 and safety valve 7 are covered with a box-shaped protective cover 12 which is a protector for eliminating inadvertent operations. Similarly, the auxiliary equipment constituting the gas supply equipment unit 8 is also distributed and covered by the protective cover 5 and the protective cover 12 in order to eliminate inadvertent operations. In this embodiment, the gas release preventer and the primary pressure regulator are housed in the protective cover 5, and the secondary pressure regulator and the gas supply pipe 9 for supplying gas to the user are housed in the protective cover 12. ing. As shown in FIG. 4, the protective cover 12 is connected to the lower peripheral wall 13 attached to the celestial mirror of the LP gas container 1 via a mounting bracket, and is connected to the upper end portion of the lower peripheral wall 13 so as to be divided into two. The upper coverings 14 and 15 are formed. That is, as shown in FIGS. 1 to 3, the lower peripheral wall 13 includes a gas extraction valve 6 disposed on the celestial mirror, a gas release preventer, a primary pressure regulator, and a safety valve of the gas supply equipment unit 8. 7 is formed on a rectangular peripheral wall that surrounds 7. The two upper covers 14 and 15 are attached to the upper end of the lower peripheral wall 13 so as to be openable and closable via hinges.

  That is, as shown in FIG. 4, one upper cover 14 is attached to the upper end portion of one side edge of the lower peripheral wall 13 through the hinge 16 so as to be opened and closed. The other upper cover 15 is attached to the upper end of a side edge (not shown in the figure) orthogonal to the side edge to which the hinge 16 of the upper cover 14 is attached via a hinge. . That is, in FIG. 1, the upper cover 15 can be opened to the right, and the upper cover 15 can be opened rearward.

  Further, a notch 17 through which the gas release pipe 10 is inserted is formed on the upper surface of the upper cover 14. This notch 17 is formed to extend to the connecting portion with the upper cover 15 so that the gas discharge pipe 10 does not interfere when the upper cover 14 is opened. Here, when the notch 17 is extended to a position where the upper cover 15 is opened and closed, the opening 18 remains in a portion other than the insertion portion of the gas discharge pipe 10 even when the upper cover 14 is closed. Therefore, the closing plate 19 that closes the opening 18 is positioned inside the upper cover 14 and is fixed to the gas discharge pipe 10 or the safety valve 7.

  In the present embodiment, the connecting portions of the two upper covers 14 and 15 are formed so as to overlap with the upper cover 15 facing outside. Similarly, the connecting portion between the upper covers 14 and 15 and the lower peripheral wall 13 is formed so as to overlap with the upper covers 14 and 15 facing outside. In addition, a pair of locking fittings 20 for locking the opening and closing of the upper cover 15 is attached to the upper cover 15 and the lower peripheral wall 13 that are overlapped on the outside. The upper covers 14 and 15 are each provided with a handle 21 for opening and closing operations.

  Next, the operation of the present embodiment configured as described above will be described. When the LP gas container 1 is filled with LP gas, a liquid phase part is formed at the bottom of the LP gas container 1, and a gas phase part in which the LP gas in the liquid phase part is vaporized is formed at the top. When the gas extraction valve 6 is opened, the gas adjusted to a predetermined pressure can be extracted via the gas supply equipment unit 8. The extracted gas is supplied to a user (not shown) through a pipe connected to a gas supply pipe 9 positioned in the protective cover 5. Further, when the pressure in the LP gas container 1 rises abnormally for some reason, the safety valve 7 is actuated to release the gas in the gas phase part to the atmosphere via the gas discharge pipe 10, and the pressure in the LP gas container 1 is reduced. Hold below a predetermined value.

  In the embodiment configured as described above, when the gas discharge valve 6, the safety valve 7 or the gas discharge prevention unit of the gas supply equipment unit 8 and the maintenance of the primary pressure regulator, etc. are necessary, the lock fitting 20 is applied. After removing the lock, the upper cover 15 is opened as shown in FIG. 2, and then the upper cover 14 is opened as shown in FIG. Therefore, maintenance work such as inspection, operation, and replacement of all devices such as the gas take-out valve 6, the safety valve 7, and the gas supply equipment unit 8 housed in the protective cover 12 can be easily performed.

  In addition, according to the present embodiment, the gas release pipe 10 connected to the secondary side of the safety valve 7 can be arbitrarily routed without affecting the maintenance work of the equipment housed in the protective cover 12. Therefore, even if a liquefied gas supply device is installed in a building such as a container in a cold district or the like, the gas released from the safety valve 7 can be guided outdoors.

  Even if the liquefied gas supply device is not installed in the building and is installed with measures to prevent snow accumulation and snowfall, the gas released from the safety valve 7 is released to a position away from the liquefied gas supply device. If desired, the gas discharge tube 10 can be arbitrarily routed. For example, when snow is deposited on a protective cover having a gas discharge port of a safety valve having a structure described in Patent Document 1, water that has melted snow enters the safety valve through a gap provided in the gas discharge port, and the safety valve is There is a risk of corroding or disturbing normal operation. Therefore, a gas discharge pipe 10 that separates the gas discharge port of the safety valve 7 from the safety valve 7 is provided, and water is introduced into the safety valve 7 by inclining the gas discharge pipe 10 or providing a water draining means such as a water drain hole in the middle. Can be prevented.

  In the above embodiment, an example in which the liquefied gas supply device of the present invention is applied to a vertical LP gas container has been described, but it goes without saying that the present invention can be applied to a horizontal LP gas container.

  In the above embodiment, the upper cover 14 is opened to the right and the upper cover 15 is opened rearward. However, the opening direction is not limited to this. Further, the upper cover can be divided into three or more and can be opened and closed.

It is the front view which installed the liquefied gas supply device of one embodiment to which the present invention is applied in the container warehouse. It is a side view of the liquefied gas supply apparatus of FIG. 1 embodiment. It is a top view of the liquefied gas supply apparatus of FIG. 1 embodiment. It is a perspective view of the protector which is a protective cover of FIG. 1 embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 LP gas container 2 Container 5 Protection cover 6 Gas extraction valve 7 Safety valve 8 Gas supply equipment unit 9 Gas supply pipe 10 Gas discharge pipe 11 Cap 12 Protection cover 13 Lower peripheral wall 14,15 Upper cover 16 Hinge 17 Notch 19 Blocking plate 20 Locking bracket

Claims (4)

A container filled with liquefied gas supplied from the liquid intake valve; a gas extraction valve connected to an upper portion of the container; and a pressure regulator for adjusting the pressure of the gas extracted from the gas extraction valve. Liquefaction comprising an accessory device for gas supply, a safety valve connected to the upper part of the container, and a box-shaped protective cover provided surrounding the gas extraction valve, the accessory device, and the safety valve In the gas supply device,
The protective cover is formed by being divided into a lower peripheral wall fixed to the container and at least two upper covers attached to an upper end portion of the lower peripheral wall via a hinge so as to be opened and closed, A liquefied gas supply apparatus, wherein a notch through which a gas discharge pipe connected to the safety valve is inserted is formed on an upper surface of one upper cover. 2. The liquefied gas according to claim 1, wherein the notch formed on the upper surface of the one upper cover extends to an open / close connection position with the other upper cover. Feeding device. The one upper cover is attached to one side wall of the lower peripheral wall via the hinge, and the other upper cover is attached to the side wall of the lower peripheral wall orthogonal to the one side wall via the hinge. The liquefied gas supply device according to claim 1, wherein the liquefied gas supply device is provided. The open / close connecting portion between the one upper cover and the other upper cover is formed so as to overlap with one of the upper covers, and the upper cover and the lower layer stacked on the outer side. The liquefied gas supply device according to any one of claims 1 to 3, wherein a locking metal fitting for locking the opening and closing of the upper cover is attached to the peripheral wall.

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