JPH08338595A - Method for adjusting vaporization of volatile liquid and gas cylinder - Google Patents

Abstract

PURPOSE: To provide intense flame and to reduce the quantity of residual gas by incorporating a regulator in which two pressure reducing member having different porosities are arranged with a space therebetween, so as to transmit pressurized volatile liquid from the pressure reducing member having a low porosity to the pressure reducing member having a high porosity in order to vaporize the liquid. CONSTITUTION: A substantially cylindrical valve casing 3 is fitted in a cap part 2 of a gas bottle 1 in which a mixture gas composed of three kinds of gas, that is, propane, isobutance and butane is charged under a pressure of about 4kg/cm2 , through the intermediary of a rubber packing 4. A regulator 8 in which a columnar pressure reducing member 5 made from sintered Cu-Su metal powder having a sintered density of 6.5 to 6.6g/cm3 and having a high porosity, and a columnar pressure reducing member 6 having a sintered density of 6.5 to 6.6g/cm3 and having a low porosity are secured to the upper and lower end parts of the cylindrical sleeve 7. Further, a shut-off valve 11 which is urged by a coil spring 10, for opening and closing a discharge port is located in a valve casing 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for vaporizing a combustible volatile liquid and a pressurized gas cylinder.

[0002]

2. Description of the Related Art As a device using a pressurized gas cylinder filled with a flammable liquefied gas, there are, for example, a gas lighter, a tabletop stove, and a torch lamp used for brazing. Each of these uses a flame in which a volatile liquid in a cylinder is vaporized, taken out from a discharge port of a mouthpiece part of the cylinder, ignited and burned. The reason why the liquid is not directly used for combustion is that the liquid remains incompletely combusted and the flame becomes unstable.

Therefore, in the equipment using the above-mentioned pressurized cylinder, various measures have been conventionally made in order to utilize only the vaporized gas. For example, in a gas lighter or the like, the liquefied gas is vaporized by narrowing the outlet from the cylinder, but it was difficult to maintain a stable flame.

A pressurized cylinder used for a torch lamp or the like is usually filled with a liquefied gas of a mixture of three kinds of propane, isoptan and butane. An absorber for absorbing and retaining the filled liquefied gas is housed in the cylinder. This absorber is composed of powdered pulp material, organic or inorganic fiber powder, etc., and has a high ability to hold liquefied gas inside, so not only during normal use,
Even when the cylinder which has been a problem has been used upside down, there is an advantage that the vaporized gas can be used without sending out the liquefied gas from the outlet.

However, since such an absorber is minute and light, filling work into the cylinder is very difficult and the material cost is high. In addition, since the absorber of these powders easily goes out together with the gas at the time of use, in order to prevent this, a filter is attached as a separate part inside the cylinder, and other parts for more efficient gas release are also included. Some points may be added. Therefore, the cost of those parts and the number of man-hours for assembling also increase, and the cost rises.

Further, when the flame becomes so small that it cannot be used as a torch lamp, the pressure cylinder is replaced. About 30% of the initial amount of liquefied gas filled in the cylinder at the time of replacement. % Is retained in the absorber and remains unused. For this reason, when a used cylinder is thrown into an incinerator at the time of disposal, there is a risk of explosion, and even if a treatment for making a hole in the cylinder is performed, the liquefied gas attached and retained on the absorber is not easily discharged. For example, butane, which has a low vaporization temperature, continued to vaporize little by little even after 72 hours, which was dangerous.

Further, as described above, the conventional pressure cylinder has a large number of parts, and is a composite waste because it is a composite product of metal, plastic, paper, etc. in terms of material, and is therefore composed of a metal unit or a plastic unit. It had the drawback that it was more difficult to dispose of than waste.

Further, a cylinder for a tabletop stove has the same problem as that of the cylinder for a torch lamp, and in particular, the treatment of a used cylinder is very dangerous in terms of human body in a general household.

In view of the above-mentioned problems, the present applicant previously disclosed in Japanese Patent Application No. 6-339908 that a stable flame can be continuously maintained without using the above-mentioned absorber and, at the time of disposal, I have already proposed a gas cylinder of volatile liquid, which is pollution-free without any danger. That is, porosity obtained by sintering metal powder having a particle size of 40 μm or less
A 38 to 41% porous member and a porous member with a porosity of 40% or less are provided in the mouth of the pressure cylinder, and both the liquid and gas parts of the flammable liquefied gas in the cylinder are passed through these members to form a gas. It is a gas cylinder taken out as.

[0010]

However, of the gas cylinders proposed above, the gas cylinder for a torch lamp, for example, has the following drawbacks. That is, as described above, the liquefied gas in the cylinder is a mixture of three kinds, of which the highly volatile propane component is vaporized first, and then isobutane and butane, but the less volatile butane component remains in the cylinder. The inconvenience still remained. The pressure inside the cylinder is initially set to about 4 kg / cm ² , but it is only a little after use.
The pressure drops to about 3 kg / cm ^{2 in} 10 to 15 seconds. The pressure drops to about 2 kg / cm ² when using about 1/3 of the cylinder, and to about 1 kg / cm ² when using half the pressure. This is because the liquid surface is rapidly cooled by the heat of vaporization of propane in the initial stage of use, so that the entire gas cylinder is cooled and gradually becomes difficult to vaporize.

Such a drawback is because the mixed liquefied gases of three kinds having different vaporization rates are taken out in both a gas state and a liquid state, and as a result, it is impossible to cope with a change in the flow rate of the taken out gas. There wasn't. Therefore, in the use as a torch burner, the length of the flame was about 80 mm in the conventional one using only vaporized gas, but in the above, the maximum is 60 to 70 mm and the flame is unstable. It was clearly inferior to the conventional product.

[0012]

DISCLOSURE OF THE INVENTION The present invention has been studied in view of the above, and as a result, a flame equivalent to the conventional one can be obtained, a component such as an absorber is not required, and a volatile liquid of stable combustion flame can be obtained. A vaporization adjusting method and a gas cylinder are provided.

That is, the volatile liquid vaporization adjusting method of the present invention uses a regulator in which two depressurizing members having different porosities are separated from each other through a void, and a depressurizing member having a small porosity is depressurized to have a large porosity. It is characterized in that it is vaporized by passing a pressurized volatile liquid to the member side.

Further, in the gas cylinder of the present invention, a regulator having two decompression members having different porosities separated from each other via a void is provided in the vicinity of a base in a cylinder filled with a volatile liquid, and a decompression member having a large porosity is provided. It is characterized in that the other side of the flexible hose having a weight at the tip thereof is attached to the pressure reducing member having a small porosity. It is effective to use a member obtained by sintering or firing metal powder, synthetic resin powder, or ceramic powder as the depressurizing member. Further, the depressurizing member is made of a sintered body of Cu—Sn alloy powder and has a large porosity. of the sintered body density was 6.5~6.6 g / cm ^3, is also effective to a sintered body density of small vacuum member porosities and 6.4~ 6.5g / cm ^3.

[0015]

In the present invention, the liquefied gas is directly led to the regulator, and this is immediately vaporized by passing the pressure reducing member through two stages. Therefore, even the above-mentioned three kinds of mixed gas can be used as they are as a mixed liquid, so that there is no problem that the component gases having different vaporization rates are sequentially used in a gaseous state as in the conventional case. In order to guide the liquefied gas directly to the regulator in this way, attach a flexible hose with a weight to the liquid inlet of the tip and keep the tip of the flexible hose immersed in the liquid no matter how the cylinder tilts. It was configured like this.

Further, in the present invention, the liquefied gas is vaporized in two stages by a regulator in which two decompression members having different porosities are separated by a space. This is because when pressurized liquefied gas is guided to a void through a decompression member having a small porosity via a flexible hose, it is in a depressurized state in the void, but bubbles of bubbles are generated by the liquefied gas passing through. Then, the liquefied gas becomes vaporized and new pressure is generated in the void. The pressure inside the cylinder is applied to the decompression member side with a small porosity, while the decompression member side with a large porosity is open to the atmosphere, so the pressurized gas generated in the void has a decompression member with a large porosity. Pass through. Moreover, due to the tube resistance of the passage of the pressure reducing member, only a certain amount of gas is allowed to pass. Therefore, the liquefied gas in the cylinder is stably discharged from the outlet of the mouthpiece as a gas having a constant amount and a constant pressure.

As described above, in the gas cylinder of the present invention, the liquefied gas is not vaporized on the liquid surface in the cylinder, and the vaporization place is the regulator near the mouthpiece. Therefore, although the cooling effect is large due to the heat of vaporization in the regulator, if there is a flame generation source such as a torch lamp in the mouthpiece part, the heat will heat the regulator part, so there will be no sudden temperature drop in the vaporization part and the pressure in the cylinder It can prevent the deterioration. Even when the flame source is not on the mouthpiece like a tabletop stove, the temperature drop of the entire cylinder due to the heat of vaporization is smaller than that of the conventional one because the vaporization heat is not vaporized by the liquid surface of a large area inside the cylinder as described above. It is effective in preventing the decrease.

[0018]

EXAMPLES The present invention will now be described in detail with reference to Examples.
As shown in FIG. 1, a substantially cylindrical valve case is provided inside the mouthpiece (2) of the gas cylinder (1) filled with a mixed liquefied gas of propane, isobutane and butane at a pressure of about 4 kg / cm ^2. (3) was fixed to the inside of the gas discharge port at the upper end via a rubber packing (4). Then, at the lower end of the valve case (3), a cylindrical pressure reducing member A having a diameter of 50 μm and made of Cu-10% Sn alloy powder having a diameter of 3 mm × 2.5 mm and a cylindrical pressure reducing member having a diameter of 3 mm × 3.0 mm are used. B (6) is fixed by inserting the upper end part of the regulator (8) fixed inside the upper end part and the lower end part of the cylindrical sleeve (7) whose permeation has been made of the same sintered body to eliminate air permeability. did. The size of the space (9) between the decompression members A and B is φ3 x 3.0 m
m. Further, an opening / closing valve (11) is provided in the valve case (3), which is constantly pressed by the coil spring (10) toward the discharge port side so that the upper end contacts the rubber packing (4) to close the discharge port.

Here, the depressurizing members A and B are individually
The relationship between the amount of passage of the liquefied gas at a pressure of 3.5 kg / cm ² and the density of these members was investigated, and the results are shown in Table 1.

[0020]

[Table 1]

Since a suitable liquid passage amount is 1.8 cc / min, the pressure reducing member B is selected to have a density of 6.6 g / cm ³ , while the pressure reducing member A is 6.2 to 6.7 g / cm ³ as shown in Table 2. No. 1 to No. 6 regulator (8) was made by combining them. Then, in the sleeve (7) at the lower end of the regulator (8), a flexible inner diameter 1 mm x outer diameter 2 mm having a weight (13) at the tip as shown in FIG. Tube (1
4) is attached, and the liquefied gas in the cylinder is always the decompression member B.
The structure is such that it is supplied to (6). Next, when attaching a torch lamp to the base of such a gas cylinder, the protrusion (15) provided on the torch lamp pushes down the opening / closing balch (11) to guide the vaporized gas to the torch lamp (16). .

In this way, a torch lamp equipped with a regulator according to the combination of Table 2 was constructed, the torch lamp was ignited, the flame length at that time was measured, and the stability was visually observed to show the results. It is also shown in 2.

[0023]

[Table 2]

From Table 2, according to the regulator of No. 3 and No. 4 combination, the flame of the same vigor as the torch lamp using only the vaporized gas of the conventional product can be stably obtained. Moreover, the pressure inside the cylinder was always 3 to 3.5 kg / cm ^{2 and} was almost constant. According to a tabletop stove equipped with this regulator, a mixed gas with a small amount of propane is used and the initial pressure is 3 kg / cm ² , but even if the stove is used, the pressure inside the cylinder is about 2 kg / cm ² . It was almost constant.

As shown in FIG. 2, when the gas cylinder (1) is erected, the liquid level in the cylinder (1) is at the position S ₁ and the weight (13) of the silicon tube (14) is attached. The tip (T ₁ ) is located at the bottom of the cylinder (1) and the liquid level is S when the gas cylinder (1) is turned sideways.
₂ and the tip (T ₂ ) of the silicon tube (14) is at the same position as the above under the liquid surface S ₂ , and when the gas cylinder (1) is inverted, the liquid surface is S ₃ Position and the tip of the silicon tube (T ₃ )
Moves near the base (2). Therefore, no matter what state the gas cylinder is in, the inlet of the liquefied gas at the tip of the silicon tube is always below the liquid surface, and the liquefied gas can be transferred to the regulator in the liquid state. This action continues to be maintained even when the amount of the liquid decreases.

[0026]

As described above, according to the present invention, although the residual gas is about 20 to 30% in the conventional gas cylinder for the tabletop gas stove and the gas torch lamp, a flame with a stable vigor is obtained as in the conventional case. Residual gas 1 to
It can be reduced to around 3%, which has a great economic effect.
Moreover, it helps protect the environment when disposing of the cylinder and is safe for the human body.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a cylinder of the present invention.

FIG. 2 is an explanatory view of a cylinder of the present invention.

[Explanation of symbols]

 1 Gas cylinder 2 Base 3 Valve case 4 Rubber packing 5 Pressure reducing member A 6 Pressure reducing member B 7 Sleeve 8 Regulator 9 Vacancy 10 Coil spring 11 Open / close valve 12 Hose stop bush 13 Weight 14 Silicon tube 15 Protrusion 16 Torch lamp

Claims (5)

[Claims] 1. A regulator in which two depressurizing members having different porosities are separated from each other by a void, and a volatile liquid pressurized from a depressurizing member having a small porosity to a depressurizing member having a large porosity is passed through. A method for adjusting vaporization of a volatile liquid, characterized by vaporizing. 2. The method according to claim 1, wherein the depressurizing member is a member obtained by sintering or firing metal powder, synthetic resin powder or ceramic powder. 3. A regulator in which two pressure reducing members having different porosities are separated from each other in the vicinity of a mouthpiece in a cylinder filled with a volatile liquid via a void, and the pressure reducing member side having a large porosity is connected to the mouthpiece of the mouthpiece. A gas cylinder characterized in that the other end of a flexible hose having a weight at its tip is attached to a pressure reducing member having a small porosity, which is installed toward the outlet side. 4. The gas cylinder according to claim 3, wherein the pressure reducing member is a member obtained by sintering or firing metal powder, synthetic resin powder or ceramic powder. 5. The pressure reducing member is made of a sintered body of Cu—Sn alloy powder, and the pressure reducing member having a large porosity has a sintered body density of 6.5 to
6.6 g / cm ³ and then, a gas cylinder according to claim 4, wherein the sintered body density of small vacuum member porosities and 6.4~ 6.5g / cm ^3.