JPWO2005114039A1 - Gas cylinder - Google Patents

Abstract

A gas cylinder 1 provided with a valve 7 for containing a foam 9 occupying 80% or more of the internal volume of the container 3 in the pressure vessel 3 and for injecting a liquefied gas in the pressure vessel 3 above the pressure vessel 3. The communication hole 11 communicating with the valve 7 is formed in the foam 9, and the tube 53 is provided in the communication hole 11. The distal end portion 53A of the tube 53 is located at a position L that is substantially half the full amount of the pressure vessel 3 and the distal end portion 53A of the tube 53 is not in contact with the space portion 11A formed in the communication hole 11. It is provided as follows.

Description

  The present invention relates to a gas cylinder including a pressure vessel filled with liquefied gas.

Conventionally, this type of gas cylinder is generally designed to be used in a certain direction, for example, upright or lateral direction.
As an example of a conventional gas cylinder, a gas cylinder containing an adsorbent for infiltrating a liquefied gas is known. In such a gas cylinder, the foamed and resinized polyurethane foam (adsorbent) in the cylinder is filled to the vicinity of the vicinity of the shoulder of the cylinder, and the cap in which the valve support cylinder protrudes from the bottom and is fixed to the cylinder. The caulking and the valve support cylinder of the cap protrudes into a space formed between the polyurethane foam and the cap soaked with liquefied gas (see first related technology: Japanese Utility Model Laid-Open No. 4-13697).
As another gas cylinder, there is a gas torch liquefied gas cylinder that supplies gas to the gas torch main body through a nozzle. In such a gas cylinder, a hollow float connected to a nozzle via a tube is built in the gas torch body (second related technology: see Japanese Patent Laid-Open No. 4-321900).

However, in the gas cylinder described in the first related art described above, since the container is filled with polyurethane foam (adsorbent), when used in an inverted state for a long time, liquefied gas is ejected and vaporized gas There was a problem that it was difficult to inject only. There is also a problem that a large facility is required to fill the container with polyurethane foam.
In the gas cylinder described in the second related art, it is difficult to form a small container in order to secure a space for operating the built-in hollow float. In addition, when the remaining amount of the liquefied gas is reduced, the float does not operate sufficiently and the liquefied gas is ejected.
The present invention has been made in order to solve the above-described problems, and provides a gas cylinder that injects vaporized gas without injecting liquefied gas and clogging does not occur in any direction. The purpose is to provide a gas cylinder.
In order to achieve the above object, according to the gas cylinder of the present invention, a pressure vessel and a communication hole which is accommodated in the pressure vessel and adsorbs the liquid fuel and defines a space for vaporizing the liquid fuel are provided. A foam, a tube provided with a hole for guiding the vaporized fuel from one end to the other, and an upper portion of the pressure vessel, connected to the hole of the tube, the vaporized fuel A valve provided with a guide hole for guiding to a jetting part for jetting from the pressure vessel, and the tip of the tube reaches the position where it reaches approximately half the full amount of the pressure vessel The gist of the invention is that the tip of the tube protrudes from the bottom surface and the inner wall of the communication hole.

FIG. 1 is a front sectional view of a gas cylinder according to the first embodiment of the present invention.
FIG. 2 is a partially enlarged cross-sectional view of the valve, the connecting pipe, and the tube shown in FIG.
3A and 3B are cross-sectional views showing other embodiments of valves, connecting pipes, and tubes used in the gas cylinder according to the present invention.
FIG. 4 is a front sectional view of a gas cylinder according to the second embodiment of the present invention.
FIG. 5A is a VA-VA sectional view of the gas cylinder shown in FIG. 1.
FIG. 5B is a VB-VB sectional view of the gas cylinder shown in FIG. 4.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
First Embodiment Referring to FIG. 1, a gas cylinder 1A includes an aerosol pressure vessel 3 which is, for example, a cylindrical pressure vessel. At the upper part of the aerosol pressure-resistant container 3, an outlet part 5 is provided. The outlet part 5 is further provided with an injection valve 7 through which the liquefied gas contained in the aerosol pressure-resistant container 3 is vaporized and injected as vaporized gas. Is provided. As the liquefied gas, a liquefied gas having a pressure of 0.2 megapascal or more at room temperature is used. Specifically, liquefied petroleum gas mainly composed of propane and butane, dimethyl ether, and chlorofluorocarbon are used. However, the gas applicable to the present invention is not limited to these gases.
In the aerosol pressure-resistant container 3, a foam 9 for containing a liquefied gas at all times is accommodated. In the embodiment, the foam 9 is divided into three parts, and foams 9A, 9B, and 9C having substantially the same dimensions are stacked from the bottom in the aerosol pressure resistant container 3 and accommodated in the pressure resistant container 3. The foams 9A, 9B, and 9C occupy 80% or more of the inner volume of the aerosol pressure vessel 3. Moreover, as this foam 9, a urethane foam and a melamine foam are generally used. However, the foam may be made of other materials as long as it absorbs liquefied gas well.
As shown in FIG. 1, a communication hole 11 extending in the vertical direction in the foams 9B and 9C is formed in substantially the axial center of the foams 9B and 9C. The upper part of the communication hole 11 communicates with the outlet part 5 of the aerosol pressure vessel 3.
As shown in FIG. 2, the valve 7 includes a mountain cup 13. On the outer periphery of the mountain cup 13, a cylindrical shaft portion 17 provided with a coupling screw portion 15, and a projection portion 19 is bent concentrically with the shaft portion 17, and the projection portion 19 faces downward. A gasket 21 is fitted in the ring groove. A support cylinder 23 is provided in the shaft portion 17 of the mountain cup 13. The support cylinder 23 includes an upper main body 23A and a lower main body 23B provided integrally with a lower portion of the upper main body 23A so as to protrude from the mountain cup 13. Inside the upper body 23A, a space 25 is provided, and a hole 27 is provided in the lower body 23B. The hole 27 and the space 25 are communicated with each other.
A stem 31 is provided in the space 25 of the upper main body 23A via a spring 29, and a gasket 33 is provided on the upper surface of the upper main body 23A. The gasket 35 is fitted to a part of the stem 31. The stem 31 has a gas outlet hole 35 extending in the vertical direction. An orifice 37 is provided in the gas outlet hole 35.
A male screw 39 is formed on the outer periphery of the upper portion of the lower main body 23B. On the inner periphery of the upper portion of the connecting pipe 41 extending in the vertical direction, a female screw 43 that is screwed with the male screw 39 is formed. An insertion hole 45 is formed at a substantially central portion in the vertical direction of the connecting pipe 41. A hole 47 communicating with the insertion hole 45 is formed below the insertion hole 45. An insertion hole 49 having a diameter larger than the diameter of the hole 47 is formed in the communication pipe 41 so as to communicate with the hole 47.
A filter 51 is inserted into the insertion hole 45 formed in the connecting pipe 41. The filter 51 is made of a porous material having a function of removing foreign substances. Furthermore, a tube 53 having substantially the same diameter as the insertion hole 49 formed in the connecting pipe 41 is fitted tightly from below. The insertion hole 49 and the tube 53 may be fixed with a screw or the like.
As shown in FIG. 1, the distal end portion (lower end portion) of the tube 53 is located in the communication hole 11 at a position L when a liquefied gas corresponding to half the volume of the pressure-resistant vessel 3 is injected. The length of the tube 53 is set so that 53A can be reached. In addition, the length of the tube 53 is provided so as not to reach the space 11 </ b> A formed in the connection pipe 41. In other words, the length of the tube 53 is set so that the distal end portion 53A is disposed at a position separated from the lowermost part 11B of the communication hole 11 and the inner wall 11C.
As shown in FIG. 2, the diameter of the hole 53 </ b> B of the tube 53 is substantially the same as the diameter of the hole 47, and the hole 53 </ b> B communicates with the hole 47. The outer diameter r of the tube 53 is about ½ of the inner diameter R of the communication hole 11.
As described above, the liquefied gas is injected up to the position L into almost half of the full-filled amount of the aerosol pressure vessel 3 and is always soaked in the foam 9. When the stem 31 is pushed downward from the left half state of FIG. 2 to the right half state of FIG. 2 against the urging force of the spring 29, the gasket 33 is pushed downward and detached from the stem 31. The orifice 37 is communicated with the space portion 25.
As a result, the liquefied gas is vaporized in the space portion 11A formed in the communication hole 11, passes through the filter 51 through the hole 53B and the hole 47 from the distal end portion (lower end portion) 53A of the tube 53, and further into the hole portion 27, The gas is injected outside as a vaporized gas from the gas outlet hole 35 through the space 25 and the orifice 37.
The distal end portion 53A of the tube 53 is set to a position L that is almost half of the full injection amount of the aerosol pressure-resistant container 3, and the vaporized gas generated from the liquefied gas soaked in the foam 9 is in the communication hole 11. Only the vaporized gas can be injected from the distal end portion 53 </ b> A of the tube 53 through the space portion 11 </ b> A formed in FIG. In addition, when the aerosol pressure vessel 3 is used in an inverted state or when it is used sideways, that is, regardless of the direction of operation, the vaporized gas generated from the liquefied gas is always in the communication hole 11. Only the vaporized gas can be injected from the distal end portion 53A of the tube 53 through the space portion 11A formed in the above. That is, the liquefied gas is not injected from the outlet hole 35 as in the prior art, and only the vaporized gas is injected.
Further, since the hole portion 27 of the valve 7 and the hole 53B of the tube 53 are connected by the connecting pipe 41 having the filter 51 inside, impurities such as dust are removed, so that the vaporized gas is guided. Clogging can be prevented.
Since the outer diameter r of the tube 53 is formed to be approximately half of the inner diameter R of the communication hole 11, the liquefied gas always passes through the space portion 11 </ b> A formed in the communication hole 11 and the tip of the tube 53. Only the vaporized gas is injected from the portion 53A.
Since the foam 9 is divided into a plurality of foams 9A, 9B, 9C, for example, the foam 9 can be easily and easily inserted into the aerosol pressure resistant container 3.
Second Embodiment In the first embodiment, the foam 9 is composed of three foams 9A, 9B, and 9C. However, the number of foams is not particularly limited to three. In general, if the number of foams is increased, more liquefied gas can be contained. However, in order to insert each foam into the pressure vessel 3 and to insert the tube into a predetermined position, each foam It becomes difficult to align the centers of each other.
In the second embodiment described below, a gas cylinder 1B in which more foams can be inserted into the pressure vessel 3 while providing the advantages of the first embodiment will be described. 3A to 5, members having the same numbers are the same as the members described in the first embodiment, and therefore, redundant description is omitted below.
3A and 3B show valves 70A and 70B used when, for example, four or more foams 90 (90A, 90B, 90C, and 90D) to be described later are inserted into the pressure-resistant container 30 (see FIG. 5). ing. In FIG. 3A (3B), the left side from the central axis shows a state where no gas is ejected, and the right side shows a state where gas is ejected.
In this embodiment, as the number of foams increases, the length of the tube 530A (530B) provided with the through hole 560A (560B) for guiding the vaporized gas to the stem 31 is the same as that in the first embodiment. It is longer than the length of the tube 53. Further, in the valve 70B according to the modification shown in FIG. 3B, an adapter 540 is attached to the tip of the tube 530B. Inside the adapter 540, a through hole 542 that is formed to have substantially the same diameter as the through hole 560B and guides the gas is provided. When the adapter 540 is attached to the tube 530B, the centers of the through hole 560B and the through hole 542 are aligned with each other. In addition, the insertion end surface 541 of the adapter 540 is chamfered so that it can be easily inserted into the communication hole 110 provided in each of the adsorbents 90B, 90C, 90D. Even when the adapter 540 is not used, the tip 531 of the tube 530A may be chamfered.
As shown in FIG. 4, in the present embodiment as well, the liquefied gas corresponding to half the volume of the pressure resistant vessel 30 in the communication hole 110 is injected as in the first embodiment. The length of the tube 530B (530A) is set so that the adapter tip 541 of the tube 530B (or the tip 531 of the tube 530A) reaches the position L2. In addition, the length of the tube 530B (530A) is provided so as not to reach the space 110A formed in the connecting pipe 41. In other words, the length of the tube 530 </ b> B (530 </ b> A) is set so that the distal end portion 53 </ b> A is disposed at a position separated from the lowermost part 110 </ b> B of the communication hole 11 and the inner wall 110 </ b> C of the communication hole 110.
5A and 5B compare the cross section of the adsorbent 9 used in the first embodiment and the cross section of the adsorbent 90 used in the second embodiment. As understood from FIGS. 4A and 4B, the diameter R10 of the adsorbent 90 is set smaller than the diameter R1 of the adsorbent 9. Further, the inner diameter R20 of the adsorbent 90 is set larger than the inner diameter R2 of the adsorbent 9. That is, the relational expressions R1> R10 and R2 <R20 are satisfied.
By forming the adsorbent 90 so as to satisfy the above relational expression, the operation of inserting the adsorbent 90 into the pressure vessel 30 can be easily performed, and a tube 530A (530B) longer than the conventional one as shown in FIGS. 3A and 3B. When using the tube 530A (530B) can be easily passed through the communication hole 110. Further, as described above, when the adapter 540 shown in FIG. 3B is provided, the adsorbent 90 can be easily inserted into the communication hole 110 further.
In addition, also in the said 2nd Embodiment, there exists an effect similar to the said 1st Embodiment except the above-mentioned point.
The present invention is not limited to the embodiment of the invention described above, and can be implemented in other modes by making appropriate modifications. Therefore, the number of adsorbents (foams) may be 5 or more by appropriately changing the length of the tube.

As can be understood from each of the above embodiments, the vaporized gas generated from the liquefied gas that is set so that the tip of the tube is positioned at approximately half the full-filled amount of the pressure vessel, and is always soaked in the foam. Can inject only the vaporized gas from the tip of the tube through the space formed in the communication hole. Moreover, even if the pressure vessel is in an inverted state, it can be turned sideways, that is, in any direction, the vaporized gas generated from the liquefied gas always passes through the space formed in the communication hole, Only the vaporized gas can be injected from the tip of the tube. That is, unlike the conventional case, the liquefied gas is not injected from the outlet hole, and only the vaporized gas can be injected.
In addition, since a connecting pipe having a filter inside is connected between the valve and the tube, impurities such as dust can be removed by the action of the filter so that it is not always clogged.
Further, since the outer diameter of the tube is formed to be approximately half of the inner diameter of the communication hole, the liquefied gas always passes through the space formed in the communication hole and is vaporized from the tip of the tube. Only can be injected.
Further, since the foam is divided into a plurality of parts, it is easy and simple to fill the pressure-resistant container with the foam.
Furthermore, a valve can be attached more easily by providing an adapter with a chamfered tip at the tip of the tube.

Claims (8)

A gas cylinder,
A pressure vessel;
A foam that is accommodated in the pressure-resistant container, adsorbs liquid fuel, and is provided with a communication hole that defines a space for vaporizing the liquid fuel;
A tube provided with a hole for guiding the vaporized fuel from one end to the other;
A valve attached to an upper portion of the pressure vessel and connected to a hole of the tube and provided with a guide hole for guiding the vaporized fuel to the ejection portion for ejecting the vaporized fuel from the pressure vessel;
The distal end portion of the tube protrudes from the valve to a position that reaches approximately half of the full volume of the pressure vessel, and the distal end portion of the tube is disposed at a position separated from the bottom surface and the inner wall of the communication hole. Gas cylinder characterized by having. The gas cylinder according to claim 1, wherein the volume of the foam housed in the pressure vessel corresponds to at least 80% of the volume of the pressure vessel. The gas cylinder according to claim 1, wherein the guide hole of the valve and the hole of the tube are connected via a connecting pipe having a filter inside. The gas cylinder according to claim 1, wherein the outer diameter of the tube is substantially half of the inner diameter of the communication hole. 2. The gas cylinder according to claim 1, wherein the foam is composed of at least two foams having the same diameter. 2. The gas cylinder according to claim 1, wherein the tip of the tube is chamfered. 2. The gas cylinder according to claim 1, wherein an adapter having a through hole communicating with a hole of the tube is provided at a distal end of the tube while covering a part of the distal end side of the tube. thing. 8. The gas cylinder according to claim 7, wherein a tip of the adapter is chamfered.

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