JP2007327581A - Spherical gas holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spherical gas holder with a gas filling part formed of a bag formed of a rubber or plastic coated cloth, easily controlling pressure in the gas filling part to deliver gas at a desired pressure. <P>SOLUTION: The gas holder comprises the gas filling part formed of the rubber or plastic coated cloth, and a gas pressurizing part. The filling part is a bag body which is formed into an approximately spherical shape when completely filled with gas. It has a gas flow-in port and a gas flow-out port, and its spherical equator portion is supported by a frame. The gas pressurizing part is formed in an approximately semi-spherical shape to cover the upper half of the gas filling part in a pressurized condition. A blowing means feeds air into a space between the gas filling part and the gas pressurizing part, and a pressure control means controls pressure in the space. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spherical gas holder. More specifically, the present invention is a spherical shape in which the gas filling portion is formed of a rubber or plastic bag, the internal pressure of the gas filling portion can be easily controlled, and the gas can be delivered at a desired pressure. Regarding the gas holder.

Spherical gas holders are widely used for storing city gas, industrial gas such as hydrogen gas and oxygen gas. The spherical gas holder used for such a purpose is large-sized, and high-strength steel or the like is used as the material, and the service life is expected to be long. On the other hand, digestion gas generated from sewage treatment plants and barns is relatively small compared to city gas, industrial gas, etc., and long-term durability is often not required for storage facilities. . Gas holders made of rubber cloth or plastic cloth have been developed as gas holders for gases that have a small amount of handling and a short equipment renewal period.
FIG. 8 is a side view of an example of a conventional gas holder made of rubberized cloth. In the gas holder of this example, a bag body 21 having a bellows structure made of rubber or plastic is installed on a base plate 23 in a frame 22. A gas inlet 24 and a gas outlet 25 are provided in the lower part of the bag body through the base plate. A top plate 26 is placed on the bag body, and a weight 27 is further placed on the top plate.
In the gas holder of this example, when the gas inlet is closed and gas is fed from the gas inlet, the bellows-structured rubber or plastic bag is inflated, and the top plate on which the weight is placed rises. When the gas inlet is closed and the gas outlet is opened, the gas inside the bag body flows out at a pressure given by the weight. The pressure inside the bag can be controlled by the weight of the weight, and the gas holder having this structure can withstand an internal pressure of about 3 kPa. The gas holder in this example requires almost no foundation work, and since the bag is folded at the start of use, it is not necessary to replace the gas inside. Since the bellows-structured rubberized plastic cloth or plastic plastic cloth bag is folded, the frame is disassembled and transported, and assembled and used immediately on site, it can be installed simply, easily and inexpensively. However, manufacturing of a bellows-structured rubberized cloth or plastic-coated cloth body takes a lot of labor and is not easy to repair, so a simpler gas holder has been demanded.
In response to such demands, the present inventor has a gas filling portion made of a rubber or plastic bag, and has a substantially spherical shape when completely filled with gas, and the equator is supported by a frame, A spherical gas holder with a gas inlet and a gas outlet at the lower end was developed. FIG. 9 is a side view of an example of the spherical gas holder. This figure shows a state where the bag is completely filled with gas. In this spherical gas holder, the gas filling portion is made of a rubber or plastic plastic bag 28, and when the gas is completely filled, the bag has a substantially spherical shape. The equator is supported. The bag is fixed to the ring by a belt (not shown) provided at the equator of the substantially spherical bag. A gas inlet 31 and a gas outlet 32 are provided at the lower end of the bag body.
FIG. 10 is a cross-sectional view showing a state in which the gas in the spherical gas holder shown in FIG. 9 is completely filled, and FIG. 11 is a cross-sectional view showing a state in which a part of the gas is discharged from the gas filling unit. A molded body 33 having a surface in contact with the inner surface of the bag body is adhered to the inside of the apex of the substantially spherical bag body 28, and a weight 34 is suspended from a hook attached to the molded body. By providing the weight inside the apex of the substantially spherical bag body, when the gas filling amount decreases and the upper portion of the bag body descends, the weight descends on the substantially spherical vertical diameter. FIG. 11 is a cross-sectional view showing a state where the gas filling amount of the spherical gas holder shown in FIG. 10 is reduced. In the spherical gas holder of this embodiment, when the gas filling amount decreases and the upper portion of the bag body descends, the weight descends on the vertical diameter indicated by the alternate long and short dash line in the figure, and the bag body is always vertical. Maintain a rotationally symmetric shape with the diameter as the axis of symmetry.
A substantially spherical bag body can be manufactured more easily than a bellows structure bag body, and a frame supporting a substantially spherical bag body has a simpler structure than a frame supporting a bellows structure bag body. Spherical gas holder can be economically manufactured and installed. The internal pressure of the gas filling portion of the spherical gas holder shown in FIGS. 10 and 11 can be controlled by the weight of the weight provided inside the apex of the bag body, but varies depending on the amount of gas stored, that is, the shape of the bag body. However, it was difficult to always send out the gas at a constant pressure. Further, since the weight provided inside the apex of the bag body is not easy to replace, it has been almost impossible to change the pressure of the gas sent out according to the situation.
As a gas storage device that has an airtight inner shell that forms one tank and an outer shell that is used to protect the inner shell from bad weather, the gas filling amount can be easily known. The shell is provided with a ballast and is connected to the outer shell at a plurality of locations. A means for detecting the position of the ballast with respect to a predetermined reference position is provided, and the outer shell is pressurized using a blower. In addition, a gas storage device has been proposed in which control of the pressure in the outer shell is ensured by using a floating damper (water level raising / lowering vent valve) (Patent Document 1). FIG. 12 is a cross-sectional view of an example of this gas storage device. The gas storage device of this example has an airtight inner shell 35 that forms a tank, and an outer shell 36 that protects the inner shell from bad weather. The inner shell is provided with a gas inflow / outlet port 37, and the gas inflow / outlet port is connected to a gas supply / discharge pipe 38. The inner shell has a ballast 39 and the position of the ballast is detected by the ultrasonic sensor 40. The inner shell is fixed to the floor by an angle 41 and the outer shell is fixed to the floor by an angle 42. Pressurization of the outer shell is performed using the blower 43, and control of the pressure in the outer shell is ensured using the floating damper 44. In the gas storage device of this example, the outer shell is larger than the inner shell that is the gas filling portion, and it cannot be said that the gas storage device has an economical structure. In the gas storage device shown in FIG. 12, the space formed between the inner shell and the outer shell is a space sufficient for a person to pass through, and an opening 45 is provided for the person to enter and exit the outer shell. This shape is not suitable for small gas holders.
JP-A-11-13297

  The present invention provides a spherical gas holder in which the gas filling portion is formed of a rubber or plastic bag, the internal pressure of the gas filling portion can be easily controlled, and the gas can be delivered at a desired pressure. It was made for the purpose of doing.

As a result of earnest research to solve the above problems, the present inventor covered the upper half of a spherical gas filling portion made of a rubber or plastic bag with a hemispherical gas pressurizing portion, It was found that by supplying air to the space between the gas filling part and the gas pressurizing part and keeping it at a predetermined pressure, it becomes possible to send gas stably from the gas filling part at a desired pressure. Based on this, the present invention has been completed.
That is, the present invention
(1) A gas holder comprising a gas filling portion and a gas pressurizing portion of a rubber or plastic cloth, wherein the gas filling portion is a bag that forms a substantially spherical shape when completely filled with gas, The spherical equatorial part is supported by a frame, and the gas pressurizing part has a substantially hemispherical shape covering the upper half of the gas filling part in a pressurized state. A spherical gas holder comprising air blowing means for sending air into the space between the pressurizing sections, and pressure adjusting means for controlling the pressure in the space;
(2) An upward opening is provided at the tip of the exhaust pipe through which air flows out from the space between the gas filling unit and the gas pressurizing unit, and the pressure in the space is controlled by a movable weight lid that covers the opening. (1) Spherical gas holder as described,
(3) A wire is attached to the apex of the gas filling unit, the wire goes out of the gas holder through a hole provided at the apex of the gas pressurizing unit, and is suspended vertically via a pulley, The spherical gas holder according to (1), wherein the gas storage amount of the gas filling unit is determined based on the position of the wire, and
(4) A spherical gas holder as set forth in (1), wherein a pressure gauge for measuring the internal pressure of the gas filling unit is provided, and the complete filling and exhausting of the gas are determined by the internal pressure of the gas filling unit,
Is to provide.

  Since the spherical gas holder of the present invention has a simple structure, a gas pressurizing part is smaller than a gas filling part, and can be installed using a simple frame, it can be manufactured economically. The spherical gas holder of the present invention is provided with a movable weight lid covering the opening at the opening at the tip of the exhaust pipe through which air flows out from the space between the gas filling part and the gas pressurizing part, and the internal pressure of the space is reduced. By adjusting the pressure, the pressure of the delivered gas can be easily controlled to a desired value.

The spherical gas holder of the present invention is a gas holder comprising a gas filling portion and a gas pressurizing portion of a rubber or plastic cloth, and the bag having a substantially spherical shape when the gas filling portion is completely filled with gas. A gas inlet and a gas outlet, the spherical equator is supported by a frame, and the gas pressurizing part is substantially hemispherical covering the upper half of the gas filling part in a pressurized state; It is a spherical gas holder having a blowing means for sending air into the space between the gas filling part and the gas pressurizing part, and a pressure adjusting means for controlling the pressure in the space.
FIG. 1 is a side view of one embodiment of the spherical gas holder of the present invention, and FIG. 2 is a sectional view thereof. FIG. 2 shows a state where the gas filling portion is completely filled with gas. In the spherical gas holder of this embodiment, the gas filling portion 1 is made of a rubber or plastic cloth bag, and when the gas is completely filled, the bag becomes a substantially spherical shape. The equator of the bag body is supported by. A gas inlet 4 and a gas outlet 5 are provided at the lower end of the bag body.
In the spherical gas holder shown in FIGS. 1 and 2, the upper half of the gas filling unit is covered with a gas pressurizing unit 6 that is substantially hemispherical in a pressurized state. There is no restriction | limiting in particular in the material of a gas pressurization part, For example, it can be set as the rubber | gum drawing cloth or plastic drawing cloth same as a gas filling part, or can also be made into a metal plate or a plastic board. A gas pressurizing part made of rubber or plastic is substantially hemispherical only in a pressurized state, and a gas pressurizing part made of a metal plate or plastic plate is in a pressurized state or in a non-pressurized state. Keep a nearly hemispherical shape. Since the gas pressurization part which consists of a rubber cloth or a plastic cloth can be folded and stored and transported before construction, it can be used suitably.

The spherical gas holder of the present invention includes a blowing unit that sends air into a space between the gas filling unit and the gas pressurizing unit, and a pressure adjusting unit that controls the pressure in the space. In the embodiment shown in FIGS. 1 and 2, air is fed into the space partitioned by the gas filling unit 1, the gas pressurizing unit 6, and the partition plate 3 by the blowing means including the blower 7 and the air feeding pipe 8, and the exhaust pipe The pressure in the space between the gas filling part and the gas pressurizing part is adjusted by the pressure adjusting means 10 provided at the tip of 9.
When the gas stored in the gas filling part is used as fuel, the required gas pressure is often 1 to 3 kPa. By controlling the pressure in the space between the gas filling part and the gas pressurizing part using the pressure adjusting means, how the shape of the bag body of the gas filling part changes due to the change in the storage amount of the gas filling part. However, the gas can be sent out at a stable and constant pressure equal to the pressure in the space between the gas filling unit and the gas pressurizing unit.
In the spherical gas holder of the present invention, an upward opening is provided at the tip of the exhaust pipe through which air flows out from the space between the gas filling unit and the gas pressurizing unit, and the space is provided by a movable weight lid that covers the opening. It is preferable to control the pressure. FIG. 3 is a side view and a plan view of an embodiment of the pressure adjusting means used in the present invention. In the pressure adjusting means of this aspect, a pipe flange 12 having a bottom sealed and an upward opening 11 is attached to the tip of the exhaust pipe 9, and three movable weight lid columns 14 are provided on the flange 13. It has been.
4A and 4B are a plan view and a side view of the movable weight lid used for the pressure adjusting means shown in FIG. 3, wherein FIG. 4A is a plan view of the movable weight lid, and FIG. 4B is a side view of the low-pressure movable weight lid. (C) is a side view of a movable weight lid for medium pressure, and (d) is a side view of a movable weight lid for high pressure. The movable weight lid 15 is provided with a hole 16 at a position corresponding to the movable weight lid support column 14 of the pressure adjustment means, and the pressure adjustment means is inserted by inserting the hole of the movable weight lid through the movable weight lid support column. It is possible to control the pressure in the space between the gas filling unit and the gas pressurizing unit. By preparing a plurality of movable weight lids having different weights, the pressure in the space between the gas filling unit and the gas pressurizing unit can be adjusted to a desired value.
FIG. 5 is a side view showing a state in which a hole of the movable weight lid is inserted through the movable weight lid column of the pressure adjusting means. A hole of the movable weight lid 15 is inserted into the movable weight lid support column 14, and the opening of the pressure adjusting means is closed by the movable weight lid.

In the pressure adjusting means shown in FIG. 3, when the inner diameter of the pipe flange 13 is 155 mm, the area of the opening 11 is 188 cm ² . In order to control the pressure in the space between the gas filling unit and the gas pressurizing unit to 2.0 kPa,
188 cm ² × 0.02 kg / cm ² = 3.76 kg
The movable weight lid is placed on the opening. When the pressure in the space between the gas filling unit and the gas pressurization unit exceeds 2.0 kPa, the movable weight lid slightly floats and air leaks from the gap between the movable weight lid and the opening, and the gas filling unit And the pressure in the space between the gas pressurizing sections is maintained at 2.0 kPa. Since air is always sent by a blower to the space between the gas filling unit and the gas pressurizing unit, the pressure in the space between the gas filling unit and the gas pressurizing unit does not fall below 2.0 kPa.
Similarly, in order to control the pressure in the space between the gas filling unit and the gas pressurizing unit to 1.0 kPa, a 1.88 kg movable weight lid is placed on the opening, and the gas filling unit and the gas In order to control the pressure in the space between the pressurizing units to 3.0 kPa, a 5.64 kg movable weight lid is placed on the opening. In the spherical gas holder shown in FIG. 10, it is extremely difficult to control the gas pressure by exchanging the weight. On the other hand, according to the pressure adjusting means used in the spherical gas holder of the present invention, the gas pressure is very easily controlled. It can be controlled to a desired value.
FIG. 6 is a side view of another embodiment of the pressure adjusting means used in the present invention. In the pressure adjusting means of this aspect, a movable weight lid 15 is attached to the flange 13 of the pipe flange 12 by a hinge 17. When the pressure in the space between the gas filling unit and the gas pressurization unit exceeds a predetermined value, the movable weight lid floats slightly, and air leaks from the gap between the movable weight lid and the opening, The pressure in the space between the gas pressurizing units is maintained at a predetermined value. When the pressure in the space between the gas filling unit and the gas pressurizing unit does not need to be changed frequently and is always maintained at a constant value, the pressure adjusting means of this aspect can be suitably used.

The spherical gas holder of the present invention has a wire attached to the apex of the bag body of the gas filling unit, the wire is taken out of the gas holder through a hole provided at the apex of the gas pressurizing unit, and is suspended vertically via a pulley. The gas storage amount in the gas filling unit can be determined based on the position of the wire. FIG. 7 is a cross-sectional view of another embodiment of the spherical gas holder of the present invention. This figure shows a state in which the gas filling amount is reduced. In the spherical gas holder of this embodiment, a level gauge 18 made of a wire is attached to the apex of the bag body of the gas filling unit, the wire is suspended vertically via a pulley, and the gas filling is performed from the position of the end 19 of the wire. The position of the vertex of the part can be read. A scale 20 for reading is provided in the range in which the end of the wire moves to facilitate reading of the position of the apex of the bag body of the gas filling portion.
When the level meter is attached to the spherical gas holder of the present invention, the gas filling portion maintains a rotationally symmetric shape with the perpendicular diameter as the symmetry axis, so the position of the apex of the bag body of the gas filling portion and the internal volume of the bag body There is a one-to-one relationship between them. Therefore, a graph showing the relationship between the position of the apex of the bag body and the internal volume of the bag body is prepared in advance, and the amount of gas stored in the spherical gas holder can be read from the graph, or the end 19 of the wire The scale of the scale 20 provided in the range in which the gas moves can be used as the internal volume of the substantially spherical bag body of the gas filling unit, and the gas storage amount can be read directly.
In the spherical gas holder of the present invention, a limit switch or the like is attached to the level meter, and the inflow and extraction of gas can be automatically controlled according to the internal volume of the substantially spherical bag body of the gas filling part.

The spherical gas holder of the present invention is provided with a pressure shape for measuring the internal pressure of the gas filling portion, and can determine whether the gas is completely filled or completely discharged by the internal pressure of the gas filling portion. When the bag body of the gas filling part is completely filled with gas, further gas inflow causes the internal pressure of the gas filling part to be higher than the pressure in the space between the gas filling part and the gas pressurizing part. Complete filling can be determined. When the gas is completely filled, it is preferable to take out the gas from the gas outlet and burn the gas using a torch or the like to keep the internal pressure of the gas filling part at a predetermined value.
There is no particular limitation on the capacity of the gas filling portion of the spherical gas holder of the present invention is preferably a 1～300M ^3, and more preferably 5 to 200 m ^3. Since general-purpose general-purpose products are commercially available for gas holders with a capacity of less than 1 m ³ , commercial products can be purchased and used economically. If the capacity exceeds 300 m ³ , the strength of the rubber or plastic cloth is insufficient, so it is preferable to produce a metal gas holder.

There is no restriction | limiting in particular in the material of the base fabric of the rubber | gum pulling cloth used for this invention, or a plastic pulling cloth, For example, a cotton fabric, a polyester fabric, a polyamide fabric etc. can be mentioned. The rubber material of the rubberized cloth used in the present invention is not particularly limited, and examples thereof include natural rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile butadiene rubber, hydrogenated nitrile butadiene rubber, and EPDM elastomer. be able to. Among these, styrene butadiene rubber, chloroprene rubber, nitrile butadiene rubber and EPDM elastomer can be suitably used. There is no restriction | limiting in particular in the plastic material of the plastic pulling cloth used for this invention, For example, a polyurethane, a polyvinyl chloride, a nitrocellulose etc. can be mentioned. Among these, polyurethane can be preferably used.
The rubber or plastic fabric used in the present invention is preferably free of abnormalities with no load at 500 times and more preferably free of abnormalities with no load at 1,000 times in the paddle test. If an abnormality occurs at 500 times with no load, the durability as a gas holder may be insufficient. The rubber cloth or plastic cloth used in the present invention is preferably 5.0 cm ³ / (m ² · s · Pa) or less in a gas permeation test using a stored gas, and preferably 3.0 cm ³ / ( m ² · s · Pa) or less is more preferable, and 1.0 cm ³ / (m ² · s · Pa) or less is more preferable. If the result of the gas permeation test exceeds 5.0 cm ³ / (m ² · s · Pa), the leakage of gas from the spherical gas holder may reach a level that cannot be ignored. A rubber test of a rubber-coated cloth or a plastic-coated cloth can be performed using a Scott-type paddle tester according to JIS K 6404-6. The gas permeation test of rubber or plastic fabric can be performed according to JIS K 6404-10 by test method B1 using a Cambridge type gas permeation test apparatus or test method B2 using a manometer type gas permeation tester.

  Since the spherical gas holder of the present invention has a simple structure, a gas pressurizing part is smaller than a gas filling part, and can be installed using a simple frame, it can be manufactured economically. The spherical gas holder of the present invention is provided with a movable weight cover that covers the opening at the opening at the tip of the exhaust pipe that flows out from the space between the gas filling unit and the gas pressurizing unit, and adjusts the internal pressure of the space. Thus, the pressure of the gas to be sent out can be easily controlled to a desired value.

It is a side view of one mode of a spherical gas holder of the present invention. It is sectional drawing of the spherical gas holder shown in FIG. It is the side view and top view of an aspect of the pressure adjustment means used for this invention. It is the top view and side view of an aspect of the movable weight lid used for the present invention. It is a side view of the one aspect | mode of the pressure adjustment means used for this invention. It is a side view of the other aspect of the pressure adjustment means used for this invention. It is sectional drawing of the other aspect of the spherical gas holder of this invention. It is a side view of an example of the gas holder made from the conventional rubberized cloth. It is a side view of an example of the conventional spherical gas holder. It is sectional drawing of the spherical gas holder shown in FIG. It is sectional drawing of the spherical gas holder shown in FIG. It is sectional drawing of an example of the conventional gas storage apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas filling part 2 Leg column 3 Partition board 4 Gas inflow port 5 Gas extraction port 6 Gas pressurization part 7 Blower 8 Air supply pipe 9 Exhaust pipe 10 Pressure adjustment means 11 Opening part 12 Pipe flange 13 Flange 14 Movable weight lid support | pillar 15 Movable weight lid 16 hole 17 hinge 18 level meter 19 wire end 20 scale scale 21 bellows structure bag body 22 frame 23 base plate 24 gas inlet 25 gas outlet 26 top plate 27 weight 28 bag body 29 pedestal 30 Ring 31 Gas inlet 32 Gas outlet 33 Molded body 34 Weight 35 Inner shell 36 Outer shell 37 Gas inlet / outlet port 38 Gas supply / discharge pipe 39 Ballast 40 Ultrasonic sensor 41 Angle 42 Angle 43 Blower 44 Floating damper 45 Opening

Claims (4)

  A gas holder comprising a gas filling part and a gas pressurizing part of a rubber or plastic cloth, wherein the gas filling part is a substantially spherical bag when completely filled with a gas, The spherical equatorial part is supported by a frame with a gas outlet, and the gas pressurizing part is a substantially hemispherical shape covering the upper half of the gas filling part in the pressurized state. A spherical gas holder comprising air blowing means for sending air into a space between the two and pressure adjusting means for controlling the pressure in the space.   2. An upward opening is provided at a tip of an exhaust pipe through which air flows out from a space between a gas filling unit and a gas pressurizing unit, and the pressure of the space is controlled by a movable weight lid that covers the opening. Spherical gas holder as described.   A wire is attached to the apex of the gas filling unit, the wire goes out of the gas holder through a hole provided at the apex of the gas pressurizing unit, and is suspended vertically via a pulley, and the position of the wire The spherical gas holder according to claim 1, wherein the gas storage amount of the gas filling unit is determined based on the determination.   2. The spherical gas holder according to claim 1, further comprising a pressure gauge for measuring an internal pressure of the gas filling unit, and determining whether the gas is completely filled or exhausted based on the internal pressure of the gas filling unit.

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