JPH0486402A - Combustion cylinder structure for petroleum burner - Google Patents

Abstract

PURPOSE:To stabilize combustion at the time of small thermal power by connecting the lower end of an auxiliary cylinder provided on the outer periphery of an inner flame cylinder opposed to the upper through hole of an outer flame cylinder through a small gap to the inner flame cylinder, and connecting the upper end of the auxiliary cylinder to the inner flame cylinder and a ceiling plate. CONSTITUTION:When a wick 10 disposed under a gap A between inner and outer flame cylinders 1 and 2 is ignited, a rising gas flow is generated in the gap A, combustion air from the through holes of the cylinders 1, 2 is supplied into the gap A, and petroleum gas vaporized from the wick 10 is burned. When the wick 10 is moved down to a small thermal power, a flame is lowered to the vicinity of the outer periphery of an auxiliary cylinder 4 provided on the outer periphery of the cylinder 1 in the gap A between the cylinders 1 and 2 to be burned. In this case, unburned gas of petroleum is burned in the gap A between the cylinder 4 and the cylinder 2, the air in the cylinder 2 is fed from the hole 1a directly to the hole 4a of the cylinder 4 opposed to the hole 1a for burning. Thus, unburned gas of the gap A reversely fed through the hole 4a of the cylinder 4 is again fed to the gap A between the cylinder 4 and the cylinder 2 to be burned.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a combustion cylinder that heats the inner and outer flame cylinders by burning petroleum fuel to make the inner and outer flame cylinders red hot, and heats them by the heat rays transmitted through the outer cylinder and radiated.

[Conventional technology]

The applicant has proposed a combustion tube that burns petroleum fuel between the inner and outer flame tubes, makes the outer flame tube red-hot with the heat of combustion, and emits heat rays from the outer tube made of a heat-resistant heat-transmitting tube. This invention was developed in
No. 5083).

As a proposal for increasing the range of firepower adjustment similar to this invention, a structure is proposed in which a fluid control is provided in the inner flame cylinder and air is flowed downward from the upper end opening of the fluid control into the gap between the fluid control and the inner flame cylinder. Japanese Patent Publication No. 1-52644), and the applicant's proposal of providing a porous central cylinder within the internal flame cylinder and controlling the air flow supplied from the porous internal flame cylinder through small holes in the central cylinder (Japanese Patent Application No. 2-8596).
No. 4).

[Problem to be solved by the invention]

The object of the present invention is to improve the degree of red heat and to prevent combustion performance from being impaired even when the heating power is reduced to a low level. In order to improve the red heat of the outer flame tube, combustion gas should be flowed outside the outer flame tube to cause combustion on the outside, and the outer flame tube should be heated from the outside as well. It has been found that in order to prevent the generation of bad odors when the unburned gas flows back into the inner flame cylinder, it is necessary to retwist the unburned gas that has flowed back.

The structure of the porous center cylinder makes it difficult for unburned gas to flow back into the inner flame cylinder when the fire power is reduced, and the unburnt gas that flows back into the inner flame cylinder is removed by the gap between the inner and outer flame cylinders. The structure of the fluid restrictor, which is caused to flow in together with the air flow for combustion, becomes an obstacle to the air flow supplied from the inner flame tube to the gap between the inner and outer flame tubes. For this reason, the combustion tube is designed so that the amount of air supplied from the inner flame tube is small and stable combustion can be achieved even when the amount of air supplied from the inner flame tube is small. Prevents the occurrence of bad odors. However, the fact that the amount of combustion cannot be controlled is extremely disadvantageous in making the outer flame tube red-hot, and when the firepower is reduced to a small flame, even if bad odors can be prevented, the red heat of the outer flame tube becomes worse.

[Means to solve the problem]

In order to solve the above problems, in the present invention, an outer cylinder 3 is arranged outside the inner flame cylinder 1 and the outer flame cylinder 2. , in a combustion tube in which the upper through hole 2b is set closer to the lower through hole 2a in the outer flame tube 2, there is a small gap A on the outer periphery of the inner flame tube 1 facing the upper through hole 2b of the outer flame tube 2. An auxiliary cylinder 4 is provided through the auxiliary cylinder 4, the lower end of the auxiliary cylinder 4 is connected to the inner flame cylinder 1, and the upper end is connected to the top plate 5 provided on the upper part of the inner flame cylinder 1 and the auxiliary cylinder 4. This relates to the structure of the combustion cylinder.

Further, if the aperture ratio of the through hole 4a provided in the auxiliary cylinder 4 is greater than the aperture ratio of the through hole 1a of the inner flame cylinder 1 in the portion facing the auxiliary cylinder 4, then unburned gas flows into the inner side of the inner flame cylinder 1. It is even more effective to prevent leakage.

[For production]

With the above-described configuration, the present invention has the above-mentioned configuration, and when the wick that looks into the lower part of the gap between the inner and outer flame tubes 1 and 2 is ignited, an upward airflow is generated in the gap, and combustion occurs through the through holes of the inner and outer flame tubes 1 and 2. Air is supplied into the gap and the petroleum gas vaporized from the wick is combusted. At this time, the outer flame tube 2 corresponding to the heat transmitting tube 3b on the upper part of the outer tube 3 becomes red hot and radiates heat rays around the combustion tube.

To adjust the firepower, move the wick up and down to change the amount of oil vaporized, but when lowering the wick to reduce the heat power, the flame changes between the inner and outer flame tubes.
2, the flame descends to near the outer periphery of the auxiliary cylinder 4 provided on the outer periphery of the inner flame cylinder 1 and burns.

At this time, the unburned petroleum gas is being combusted within the gap between the auxiliary cylinder 4 and the outer flame cylinder 2, and the air in the inner flame cylinder l flows from the through hole 1a to the auxiliary cylinder 4 facing the through hole 1a. It flows directly into the through hole 4a and is used for combustion. Therefore, even if unburned gas tries to flow backward through the through hole 4a of the auxiliary cylinder 4 and flow out into the gap, the gap A
Since there is almost no air flow along the inside, the unburned gas that flows back flows into the gap between the auxiliary cylinder 4 and the outer flame cylinder 2 again from the through hole 4a near the through hole 4a and is combusted. Moreover, since the aperture ratio of the through hole 1a of the inner flame cylinder 1 is made smaller than that of the through hole 4a of the auxiliary cylinder 4, the flow connection for the same amount of air is
There is no fear that the unburnt gas that has flowed back into the gap due to the speed a will flow back into the inner flame cylinder 1.

Therefore, due to the draft in the gap between the auxiliary tube 4 and the outer flame tube 2, the air that flows into the upper part of the flame in the gap and is discharged as it is is the air inside the inner flame tube 1 that does not contain unburned gas, and Since the air inside the inner flame cylinder 1 is supplied to the inner flame as before through the through holes 1a and 4a to continue combustion, no foul odor is generated even when the wick is lowered and the fire power is reduced to a low level.

On the other hand, in order to make it difficult for unburned gas to flow out from the through hole 4a of the auxiliary cylinder 4 in the combustion flame part into the gap A, it is important to select the dimensions of the through holes 1a and 4a and the gap A. If two-stage air control is performed in 4a, it becomes difficult to increase the total amount of combustion air. In this invention, the auxiliary tube 4 is attached to the outside of the inner flame tube 1, and the gap between the inner and outer flame tubes 1 and 2 is narrowed at the auxiliary tube 4, so that the unburnt gas vaporized from the wick is transferred to the outer flame. The air flows near the tube 2, and the air outside the outer flame tube 2 promotes combustion near the outer flame tube 2, improving the red-hot condition. In addition, when the gap between the inner and outer flame tubes becomes narrower in the auxiliary tube 4 portion, the draft within the gap becomes stronger, making it easier for air to flow in through the through holes 1a and 4a.
It also promotes side combustion and improves the red-hot state.

〔Example〕

The configuration will be explained below with reference to figures showing examples.

1 is an inner flame cylinder having a large number of through holes 1a; 2 is an outer flame cylinder having a large number of lower through holes 2a and upper through holes 2b, with the upper through hole 2b having a larger diameter than the lower through hole 2a; 3 is an outer flame cylinder having a large number of lower through holes 2a and upper through holes 2b; The outer cylinder is located outside the outer flame cylinder 2, and the lower part 3a is formed of an opaque cylinder, and the upper part 3b is formed of a heat-resistant heat-transmissive cylinder, and these are arranged concentrically. Reference numeral 4 denotes an auxiliary tube provided on the outer periphery of the inner flame tube 1 through a small gap, and is positioned facing the upper through hole 2b of the outer flame tube 2. The lower end of the auxiliary tube 4 is connected to the inner flame tube 1. The upper end is connected to the top plate 5 provided above the inner flame tube 1 and the auxiliary tube 4. The upper end of the inner flame tube 1 and the top plate 5 may be attached through a slit-shaped opening or may be attached in contact with each other, and the slit-shaped opening functions as a through hole 1a.

6 is a flame expander installed on the top of the top plate 5, 7 is a flame expander installed on the top of the flame expander 6, 8 is attached to the upper end of the outer flame tube 2,
An outer flame tube top plate 9 whose inner edge is located above the gap between the inner and outer flame tubes 1 and 2 and whose outer edge holds the upper end of the heat-resistant heat transmitting tube 3b is mounted on the outer edge of the outer flame tube top plate 8, The upper flame tube that constitutes the next combustion chamber is composed of a heat-transmitting tube or an opaque tube. 10 is the wick with the tip looking into the gap between the inner and outer flame tubes 1 and 2, 11 is the wick 1
0, and the inner and outer flame tubes 1 and 2 are mounted on the core housing tube l]. Reference numeral 12 denotes a flow control plate installed inside the lower part of the inner flame tube J.

In this embodiment, a secondary combustion chamber is constructed by a flame expander 7, an upper flame tube 9, etc. above the inner and outer flame tubes 1 and 2, but according to this configuration, combustion is performed at maximum firepower. The flame spreads to the secondary combustion chamber, and when the flame is reduced to the minimum strength, the flame spreads to the inner and outer flame tubes 1 and 1.
It is a normal usage that it burns up to the inside of 2. In a typical double-tube combustion tube that does not constitute this secondary combustion chamber,
Maximum firepower is when the flame is above the inner and outer flame cylinders 1 and 2, and low firepower is when the flame enters up to 1 and 2 yen of the inner and outer flame cylinders and burns.

〔effect〕

The present invention exhibits the above-described structure and operation, and since the auxiliary tube 4 is provided on the outer periphery of the inner flame tube 1 through a small gap, when the fire power is reduced to a small one, the inner and outer flame tubes 1 and 1. Even if the flame is located in the gap between the inner flame tube 1 and an air flow unrelated to combustion is formed from inside the inner flame tube 1 toward the upper side of the flame, this air flow flows through the through hole 1 of the inner flame tube 1.
a and the through hole 4a of the auxiliary cylinder 4, so the amount of air supplied to the flame from inside the inner flame cylinder 1 is not so large as to affect the amount of air supplied to the flame, and stable combustion can be continued even when the fire power is reduced to a low level. became.

In addition, the through hole 1a of the inner flame cylinder 1 is made to correspond to the through hole 4a of the auxiliary cylinder 4, so that the air that has passed through the through hole 1a does not move within the gap A, but directly from the through hole 4a near the through hole 1a to the auxiliary cylinder. 4 and into the combustion part gap between the outer flame tube 2, so even if unburned gas flows out from the through hole 4a into the PJA, it will be returned to the combustion flame at approximately the same position and used for combustion. The odor no longer occurs even when the firepower is reduced to low.

Furthermore, since the auxiliary tube 4 is provided outside the inner flame tube 1 through the gap, unburned gas rising in the gap between the inner and outer flame tubes 1 and 2 can easily flow to the outer flame tube 2 side. Because the flow velocity also becomes faster, the red heat of the inner and outer flame cylinders 4 and 2 has improved, and the red heat of the parts corresponding to the flames when the flame is reduced to low power has become so good that it is comparable to when burning with high power. It is something.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of this invention. 1...Inner flame tube 1a...Inner flame tube through hole 2...Outer flame tube 2a, 2b...Outer flame tube through hole 3... ... Outer tube 3a... Impermeable tube 3b... Heat-resistant heat-transmissive tube 4... Auxiliary tube 4a... Auxiliary tube through hole 5... ...Top plate A...Gap between auxiliary cylinder and inner flame cylinder

Claims (2)

[Claims] (1) Outside the inner flame tube 1 and outer flame tube 2, the lower part is the opaque tube 3
In the combustion cylinder, an outer cylinder 3 formed by a heat-resistant heat permeable cylinder 3b is arranged in the upper part, and the upper through hole 2b is larger than the lower through hole 2a in the outer flame cylinder 2. An auxiliary tube 4 is provided on the outer periphery of the inner flame tube 1 facing the upper through hole 2b of the outer flame tube 2 through a small gap A, and the lower end of the auxiliary tube 4 is connected to the inner flame tube 1, and the upper end is connected to the inner flame tube 1. 1 and an auxiliary cylinder 4 connected to a top plate 5 provided at the top thereof. (2) The petroleum oil according to claim 1, characterized in that the aperture ratio of the through hole 4a provided in the auxiliary cylinder 4 is larger than the aperture ratio of the through hole 1a of the inner flame cylinder 1 in the portion facing the auxiliary cylinder 4. Combustor combustion tube structure.