JPS6047484B2 - Cylindrical gas burner - Google Patents

Description

[Detailed Description of the Invention] The present invention divides the internal space of the combustion cylinder into two upper and lower chambers by an intermediate partition plate, and supplies gas to the royal chamber and the royal chamber through separate mixing pipes to separate the upper and lower combustion parts. This invention relates to a cylindrical gas burner that can be switched freely.

A commonly thought method for installing the mixing tubes in this type of burner is to connect the mixing tubes c and d from above and below, respectively, to the royal chamber a and the royal chamber, as shown in Figure 1.
According to this, both the mixing tubes c and d are placed apart above and below the combustion tube, making the device larger, and the gas control parts e and f for each mixing tube c and d are separated into upper and lower parts, and the gas piping is This comes with the disadvantage of complication.

In order to eliminate the above-mentioned inconvenience, the applicant of the present application penetrated the mixing pipe for the upper chamber into the royal house, and installed the mixing pipe for the upper chamber and the mixing tube for the lower chamber from the same direction from the same direction. The space for mixing pipes on the upper and outer sides of the combustion tube can be omitted to reduce the size of the combustion tube.
We proposed a system that would simplify gas piping.

In this case, if the mixing tube for the lower chamber is also inserted into the lower chamber, further miniaturization can be achieved, but since this burner is divided into two parts, the length of the royal chamber becomes shorter, For example, the outlet at the upper end approaches the partition plate on the upper surface of the lower chamber, and the distribution gap between the outlet and the partition plate is narrowed, resulting in the inconvenience that it becomes difficult to obtain uniform gas distribution throughout the lower chamber. The purpose of the present invention is to make it possible to further downsize the burner without causing such deterioration in gas distribution. In a device which is divided into two chambers and gas is supplied to each chamber separately through a first mixing pipe to the royal chamber and a second mixing tube to the royal chamber, the first
a mixing tube is connected to the royal chamber through the royal chamber; the second mixing tube is inserted into and connected to the royal chamber; It is formed by forming a dish-shaped depression.

Next, one aspect of implementing the present invention will be explained with reference to FIGS. 2 to 4.

In the drawings, reference numeral 1 indicates a combustion tube, and the combustion tube 1 is formed into a cylindrical shape by attaching combustion plates 4 having an arcuate cross section and forming a combustion surface 3 to each circumferential side of a support frame 2 in the form of a square tube. The internal space was partitioned into two upper and lower chambers 6 and 7 by an intermediate partition plate 5 fitted to the support frame 2.

In the illustrated example, the combustion plates 4 are installed in two stages, one above the other, corresponding to the upper and lower chambers 6 and 7.

Here, an outlet 8a at the upper end of the first mixing pipe 8 penetrated into the lower chamber 7 is connected to the upper chamber 6 through a purling hole 10 in the partition plate 5.
The lower chamber 7 shall be fitted with a
A second mixing pipe inserted into the lower chamber 7 in parallel with the first mixing pipe 8
The outlet 9a at the upper end of the mixing tube 9 is opened into the lower chamber 7 slightly below the level at which the partition plate 55 is disposed to supply gas. In the drawings, reference numeral 11 denotes a recess formed in the partition plate 5, and the recess 11 is formed in an inverted dish shape facing the outlet 9a of the second mixing tube 9, and is shown in FIGS. 2 and 3. As clearly shown, it is provided with a skirt portion 11a that widens on both sides toward the placement portion of the first mixing tube 8.

In addition, in the illustrated example, a sleeve portion 1 is provided on the periphery of the partition plate 5 and extends slightly below the opening level of the outlet 9a of the second mixing tube 9.
2 was formed, and a small hole 13 penetrating the sleeve portion 12 from the inside to the outside was formed.

In the drawings, reference numerals 14 and 15 indicate gas nozzles facing the inlets 8b and 9b at the lower ends of the first and second mixing tubes 8 and 9, respectively.

Next, to explain its operation, the upper chamber 6 has an outlet 8a of the first mixing pipe 8 on its bottom surface as shown in FIG.
is opened to obtain uniform gas distribution throughout the upper chamber 6, but in the lower chamber 7, the outlet 9a of the second mixing pipe 9
is opened to the lower chamber 7 at its upper part, and the gas distribution is biased towards the upper part of the lower chamber 7.

However, when the inverted dish-shaped recess 11 facing the outlet 9a is formed in the partition plate 5 as in the present invention, the gas from the outlet 9a hits the recess 11, causing the downward slope of the recess 11 to The gas flows downward into the lower chamber 7 and is distributed to the lower part of the lower chamber 7 to make the gas distribution uniform. The small hole 13 restricts the gas flowing out from the recessed portion 11 from being supplied to the combustion surface 3 in the upper part of the lower chamber 7, thereby effectively functioning to further equalize the gas distribution.

Also, since the first mixing tube 8 is inserted into the lower chamber 7, the flow of gas to the rear of the first mixing tube 8 is poor, but as described above, gas flow into the recessed portion 11 is difficult. If a skirt portion 11a is formed that widens on both sides toward the placement part of the first mixing tube 8,
The gas flows to both sides of the first mixing tube 8 guided by the skirt portion 11a, and the gas circulation to the rear is promoted, resulting in uniform combustion over the entire circumferential surface of the lower chamber 7. It will be done.

In addition, in the above embodiment, the peripheral surfaces of the upper chamber 6 and the lower chamber 7 are used as the combustion surface 3.
However, the present invention can be similarly applied to a type of cylindrical gas burner in which the combustion surface 3 is the peripheral surface of the lower chamber 7 and the upper surface of the upper chamber 6.

In this way, according to the present invention, the partition plate has a second section for the lower chamber.
An inverted dish-shaped recess is formed opposite the outlet at the upper end of the mixing tube, and the gas from the outlet flows downward through the recess. Gas distribution is promoted, and by increasing the insertion length of the second mixing tube into the lower chamber, even gas distribution can be obtained even when the outlet approaches the partition plate, and even when the first mixing tube for the upper chamber is inserted into the lower chamber, uniform gas distribution can be obtained. Coupled with the penetrating arrangement within the lower chamber, this has the effect of further downsizing the burner.

[Brief explanation of the drawing]

FIG. 1 is a side view of a burner with a mixing tube installed in the usual manner; FIG. 2 is a cut-away plan view of an example of a burner according to the invention;
3 and 4 are cross-sectional side views taken along the line 2--2 and the line 2-1 in FIG. 2, respectively. 1... Combustion cylinder, 3... Combustion surface, 5...
...Partition plate, 6...Upper chamber, 7...
Lower chamber, 8...first mixing tube, 9...second mixing tube, 9a...outlet, 11...recess, 11a... ...Hem part, 12...Sleeve part,
13...Small hole.

Claims (1)

[Scope of Claims] 1. The internal space of the combustion cylinder is divided into two upper and lower chambers by an intermediate partition plate, and gas is supplied to each chamber separately via a first mixing pipe to the upper chamber and a second mixing pipe to the lower chamber. In things that I care about,
The first mixing tube is connected to the upper chamber through the lower chamber, and the second mixing tube is inserted into and connected to the lower chamber, and the upper end of the second mixing tube is connected to the partition plate. A cylindrical gas burner with an inverted dish-shaped depression facing the outlet. 2. The cylindrical gas burner according to claim 1, wherein the recessed portion includes a skirt portion that widens on both sides toward the placement portion of the first mixing tube. 3. A cuff extending slightly below the opening level of the outlet of the second mixing tube is formed on the peripheral edge of the partition plate, and a small hole penetrating inside and out is formed in the cuff. 1st
The cylindrical gas burner according to item 1 or 2.